Discovered the other day that my db backups no longer work from wp dbmanager. I'm running 3.0.4 and the behavior is that I get an error when when trying to backup without gzipping the backup stating the resulting file was 0kb. If I choose to gzip the backup I get no errors, but the gzip that results is 20kb according to the interface and when I download the file and extract the archive the sql file inside is 0kb.
I have tried upgrading to 3.0.5 and issue remains. I know this worked with 3.0.3.