[@netweb Keymaster 14 years, 2 months ago]

@markusbb I am running out of ideas.
Try setting a fresh install of WordPress & bbPress on a different hosting provider or a local LAMP install on your PC and for the import use your webhosts remote SQL address to try the import again. As it will be slower using remote SQL connections lower the queries to eg. row limits = 10 and delay time = 5.

What version of bbPress Standalone are you using? If less than 1.1 can you upgrade to 1.1, does that work? If so does 1.1 -> 2.1 now work?