I would like to know the features of bbPress 0.9.0.3
There are no added new features only bugfixes, one important. No security issues.
These are the only files that need to be replaced on a 0.9.0.2sp1 install:
Props should be given to ipstenu who was the first to report the serious profile email editing bug which was actually in the code for eight months and no-one noticed. Essentially no regular member could change their email address after registering. Admin could change anyone’s email address without a problem which is why it probably went un-noticed for so long.