User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en) AppleWebKit/523.12.1 (KHTML, like Gecko) Version/3.0.4 Safari/523.12.2 Build Identifier: Version 2007112812 (1.5.4) Something is wrong with the focus ring of the Search field (top-right corner of the browser window). On its right side, the focus ring "bleeds" inside the field, which it should not. It seems that the focus ring has smaller width (on its right side) than the field itself. The same problem manifests itself with the search fields in "Show Cookies…" and "Edit Exceptions List…" modal sheets (Preferences… > Privacy). Reproducible: Always
This was also fixed by 330666 (and related bugs for the other search fields).