That does not tell you precisely in what release the bug was fixed. Plus with the release of numerous versions, it becomes a real pain to track. The best way is to have the prefix mention in what version the bug was fixed, so users can filter properly the bugs per release. Or simply post a reply similar to "Fixed in 1.2.1", so users can search for it into threads.
And what happens if you deal with bug issued 285 releases ago? Are you telling me you plan to browse the announcement forum for a date posted 4 years ago? Since the developer posts a reply, why not post also the version?