diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f9004f..478e503 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,7 @@ and the project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.
 - Binary-probe fallback in `guide.sh` when the post-install snapshot refresh is stale.
 
 ### Fixed
+- difftastic 0.71.0 puts the version into its release file names (`difft-0.71.0-x86_64-unknown-linux-gnu.tar.gz`); the catalog download URL now includes it. byobu is tagged `trustmux-v7.19` since the trustmux rename, and those tags fill the first page of the tags API, so the installer found no stable tag; it now accepts both tag forms.
 - `cmd_update_local` in MERGE mode now refreshes multi-version cycle entries (`python@3.14`, …) instead of only the base-tool entry. Resolved false-negative "Upgrade did not succeed" messages after successful uv installs.
 
 ### Changed
diff --git a/catalog/difftastic.json b/catalog/difftastic.json
index f83207c..836fbe2 100644
--- a/catalog/difftastic.json
+++ b/catalog/difftastic.json
@@ -6,7 +6,7 @@
   "homepage": "https://github.com/Wilfred/difftastic",
   "github_repo": "Wilfred/difftastic",
   "binary_name": "difft",
-  "download_url_template": "https://github.com/Wilfred/difftastic/releases/download/{version}/difft-{arch}-unknown-linux-gnu.tar.gz",
+  "download_url_template": "https://github.com/Wilfred/difftastic/releases/download/{version}/difft-{version}-{arch}-unknown-linux-gnu.tar.gz",
   "arch_map": {
     "x86_64": "x86_64",
     "aarch64": "aarch64"
@@ -17,7 +17,7 @@
       "priority": 1,
       "config": {
         "repo": "Wilfred/difftastic",
-        "asset_pattern": "difft-x86_64-unknown-linux-gnu.tar.gz"
+        "asset_pattern": "difft-.*-x86_64-unknown-linux-gnu.tar.gz"
       }
     },
     {
diff --git a/scripts/install_byobu.sh b/scripts/install_byobu.sh
index f62a04e..32118f7 100755
--- a/scripts/install_byobu.sh
+++ b/scripts/install_byobu.sh
@@ -53,18 +53,22 @@ get_installed_version() {
     fi
 }
 
-get_target_version() {
+# Print the newest stable release tag. Upstream tags releases both as "7.19"
+# and, since the trustmux rename, as "trustmux-v7.19"; the prefixed tags fill
+# the first page of the tags API, so accept both forms. For equal versions
+# the plain tag wins.
+get_target_tag() {
     local tags_json=""
-    local version=""
 
     tags_json="$(github_api_get "repos/$GITHUB_REPO/tags?per_page=100")" || tags_json=""
 
-    version="$(printf '%s' "$tags_json" |
+    printf '%s' "$tags_json" |
         jq -r 'if type == "array" then .[].name else empty end' |
-        grep -E '^[0-9]+([.][0-9]+)+$' |
-        sort -V |
-        tail -1)"
-    printf '%s' "$version"
+        grep -E '^(trustmux-v)?[0-9]+([.][0-9]+)+$' |
+        awk '{ v = $0; sub(/^trustmux-v/, "", v); print v "\t" ($0 == v ? 1 : 0) "\t" $0 }' |
+        sort -t "$(printf '\t')" -k1,1V -k2,2n |
+        tail -1 |
+        cut -f3 || true
 }
 
 remove_manifest_files() {
@@ -84,6 +88,9 @@ remove_manifest_files() {
 
 install_byobu() {
     local version="${1:-}"
+    local tag="$version"
+    local candidate=""
+    local -a tags=()
     local before=""
     local after=""
     local archive=""
@@ -96,7 +103,13 @@ install_byobu() {
 
     if [ -z "$version" ]; then
         echo "[$TOOL] Fetching latest stable tag..." >&2
-        version="$(get_target_version)"
+        tag="$(get_target_tag)"
+    fi
+    version="${tag#trustmux-v}"
+    # An explicit plain version may exist only as trustmux-v<version>
+    tags=("$tag")
+    if [ "$tag" = "$version" ]; then
+        tags+=("trustmux-v$version")
     fi
     if ! grep -Eq '^[0-9]+([.][0-9]+)+$' <<<"$version"; then
         echo "[$TOOL] Error: Invalid stable version: ${version:-<none>}" >&2
@@ -108,13 +121,18 @@ install_byobu() {
     BUILD_LOG="$BUILD_TMPDIR/build.log"
     archive="$BUILD_TMPDIR/byobu-$version.tar.gz"
     stage_dir="$BUILD_TMPDIR/stage"
-    url="https://github.com/$GITHUB_REPO/archive/refs/tags/${version}.tar.gz"
-
-    echo "[$TOOL] Downloading $url..." >&2
-    if ! curl --proto '=https' --proto-redir '=https' -fL \
-        --retry 3 --retry-delay 1 --connect-timeout 10 \
-        "$url" -o "$archive"; then
-        echo "[$TOOL] Error: Failed to download $url" >&2
+    url=""
+    for candidate in "${tags[@]}"; do
+        echo "[$TOOL] Downloading tag $candidate..." >&2
+        if curl --proto '=https' --proto-redir '=https' -fsSL \
+            --retry 3 --retry-delay 1 --connect-timeout 10 \
+            "https://github.com/$GITHUB_REPO/archive/refs/tags/${candidate}.tar.gz" -o "$archive"; then
+            url="https://github.com/$GITHUB_REPO/archive/refs/tags/${candidate}.tar.gz"
+            break
+        fi
+    done
+    if [ -z "$url" ]; then
+        echo "[$TOOL] Error: Failed to download tag(s): ${tags[*]}" >&2
         return 1
     fi
     if ! tar -xzf "$archive" -C "$BUILD_TMPDIR"; then
diff --git a/tests/test_catalog_and_collectors.py b/tests/test_catalog_and_collectors.py
index 4eb2208..39f5ba6 100644
--- a/tests/test_catalog_and_collectors.py
+++ b/tests/test_catalog_and_collectors.py
@@ -392,7 +392,8 @@ def test_byobu_installer_is_executable_and_filters_stable_tags(self):
 
         content = script_path.read_text()
         assert "^[0-9]+([.][0-9]+)+$" in content
-        assert "archive/refs/tags/${version}.tar.gz" in content
+        # The tag, not the version: releases are tagged "trustmux-v7.19" too
+        assert "archive/refs/tags/${candidate}.tar.gz" in content
         assert './configure --prefix="$INSTALL_PREFIX"' in content
         assert "$INSTALL_PREFIX/bin/byobu" in content
         assert "uninstall)" in content
diff --git a/tests/test_install_gh_fallback.py b/tests/test_install_gh_fallback.py
index 7518534..78bd25d 100644
--- a/tests/test_install_gh_fallback.py
+++ b/tests/test_install_gh_fallback.py
@@ -92,7 +92,7 @@ def test_fails_cleanly_when_neither_source_answers(self, fake_bin, tmp_path):
 @skip_on_windows
 class TestGhErrorBodyFallback:
     def test_byobu_falls_back_to_curl_when_gh_fails(self, fake_bin, tmp_path):
-        proc = _run_sourced("install_byobu.sh", "get_target_version", fake_bin, tmp_path)
+        proc = _run_sourced("install_byobu.sh", "get_target_tag", fake_bin, tmp_path)
         assert proc.returncode == 0, proc.stderr
         assert proc.stdout.strip() == "7.18"
         assert "Cannot index" not in proc.stderr
@@ -100,10 +100,50 @@ def test_byobu_falls_back_to_curl_when_gh_fails(self, fake_bin, tmp_path):
     def test_byobu_uses_gh_result_when_gh_succeeds(self, fake_bin, tmp_path):
         _write_stub(fake_bin, "gh", f"printf '%s' '{BYOBU_TAGS_JSON}'\n")
         _write_stub(fake_bin, "curl", "exit 99\n")
-        proc = _run_sourced("install_byobu.sh", "get_target_version", fake_bin, tmp_path)
+        proc = _run_sourced("install_byobu.sh", "get_target_tag", fake_bin, tmp_path)
         assert proc.returncode == 0, proc.stderr
         assert proc.stdout.strip() == "7.18"
 
+    def test_byobu_accepts_trustmux_prefixed_tags(self, fake_bin, tmp_path):
+        # Real first page of the tags API after the trustmux rename: no plain tag on it
+        tags = (
+            '[{"name":"trustmux-v7.20rc5"},{"name":"trustmux-v7.19"},'
+            '{"name":"trustmux-v7.19rc17"},{"name":"trustmux-v7.18"}]'
+        )
+        _write_stub(fake_bin, "gh", f"printf '%s' '{tags}'\n")
+        proc = _run_sourced("install_byobu.sh", "get_target_tag", fake_bin, tmp_path)
+        assert proc.returncode == 0, proc.stderr
+        assert proc.stdout.strip() == "trustmux-v7.19"
+
+    def test_byobu_prefers_plain_tag_for_equal_versions(self, fake_bin, tmp_path):
+        tags = '[{"name":"trustmux-v7.19"},{"name":"7.19"},{"name":"7.18"}]'
+        _write_stub(fake_bin, "gh", f"printf '%s' '{tags}'\n")
+        proc = _run_sourced("install_byobu.sh", "get_target_tag", fake_bin, tmp_path)
+        assert proc.returncode == 0, proc.stderr
+        assert proc.stdout.strip() == "7.19"
+
+    def test_byobu_explicit_version_falls_back_to_trustmux_tag(self, fake_bin, tmp_path):
+        # "install 7.20" when upstream only tagged trustmux-v7.20: the plain tag 404s
+        for cmd in ("make", "autoreconf", "automake", "autoconf"):
+            _write_stub(fake_bin, cmd, "exit 0\n")
+        _write_stub(
+            fake_bin,
+            "curl",
+            """for arg in "$@"; do
+  case "$arg" in
+    */refs/tags/trustmux-v7.20.tar.gz) echo "archive" > "${@: -1}"; exit 0 ;;
+  esac
+done
+exit 22
+""",
+        )
+        proc = _run_sourced("install_byobu.sh", "install_byobu 7.20", fake_bin, tmp_path)
+        assert proc.returncode == 1
+        # Reached the extract step with the prefixed tag; the stub archive is not a tarball
+        assert "Invalid source archive: https://github.com/dustinkirkland/byobu/archive/refs/tags/trustmux-v7.20.tar.gz" in (
+            proc.stderr
+        )
+
     def test_tmux_falls_back_to_release_redirect_when_gh_fails(self, fake_bin, tmp_path):
         proc = _run_sourced("install_tmux.sh", "get_target_version", fake_bin, tmp_path)
         assert proc.returncode == 0, proc.stderr