Panic recently updated their Transmit software to version 3.6.6 after the previous (3.6.5) update caused problems with syncing over .Mac. Steven Frank (co-founder of Panic) wrote on his personal blog about the issue. According to Steven, "TransmitSync," a service that syncs Transmit favorites with .Mac, would crash when certain configurations were in place.
The other change made in the 3.6.6 update is restrictions of dot characters when uploading to Amazon S3. Transmit 3.6.6 is a free upgrade to all Transmit 3 users and can be downloaded from within Transmit or from panic.com.
[via Steven Frank]