In the new Foobar2000 0.9 betas, its become apparent that ISO 8859-1 support was removed for ID3v2 tag writing. Now it is only possible to write Unicode tags in Foobar, which leads to MP3Tag being unable to see them.
Instead of all the minor bugfixes and such, I think its about time Unicode support got added to MP3Tag before Foobar 0.9 reaches a final build and starts getting more usage by the public. I don't particuarly like other tagging programs and its shame that I might have to leave MP3Tag if it can't handle Unicode tags.
Yes, I know adding Unicode support would take awhile because of the pretty large codebase, but the more it keeps getting put off, the bigger MP3Tag's codebase will get in the future with the minor additions and changes, and the longer it will take for Unicode support in the end.