I have recently ran in to an issue where the imported AutoCAD blocks disappear when I export to .dwf, this only appears to happen after I add the revision table. If I were to add the revision prior to importing the blocks all seems ok. I have tried removing the block and deleting the definitions from the Inventor.dwg then re-inserting once more and I still have the same issue. The only real working solution I've found so far is to start from new and reproduce the drawings.
Has anyone else ran in to this problem?