I've setup a small forum and I wanted to be able to back it up real easy so I chose SQLite as the database and SMF for the forum software which I really like, I tried MYBB and PHPBB with SQLite and they both had lots of errors. So, if you are looking to use SQLite then I recommend SMF forum.
MyBB is the best forum software and always will be. You must of done something wrong to get them errors.