I am using foobar2000 under my Ubuntu with Wine since… I don't know. Now, with the new Ubuntu 12.10 release foobar2000 was not starting anymore correctly so I reinstalled it (foobar2000 1.1.15, wine 1.4). Naturally I have to set up my foobar2000 configuration from scratch but thats not a problem at all.
Everything works fine except adding whole folders to the music library using the Add-button under "File->Preferences->Media Library". Problem is one can only open files with the Add-dialog but not a whole folder. Under Windows everything works fine.
Editing the foobar2000 configuration file ([foobar2000-folder]/configuration/Core.cfg) by hand does not work… I also tried it with a hex editor. :(
So… what can I do? Thanks. :)