voicemail audio quality with 2.1 update

Just updated to 2.1, everything seems to work well except voicemail playback. The audio quality of voicemail playback is suddenly terrible, as if the data is being heavily compressed on playback. Never a problem with 2.0.2. I've tested and replicated this problem with EDGE and 3G, the problem is consistent.

Audio quality during calls seems fine, only voicemails sound awful.

Has anyone else encountered this issue with 2.1? Any solutions?