What seems to be happening is that some pre-vBSEO bookmarks & links are not being properly resolved, e.g. clicking on this bookmark:
nets me an offer to download your forumdisplay.php script. Once you are in FT, internal links seem to be ok. Maybe vBSEO's rewrite instructions are corrupted?
It's still broken. A couple of my FT bookmarks don't work.
These work:
DL, UA, WN, FB, YX, MR, TS&S, CBz, ORP, OMNI
These offer downloads:
NW, CO
Seems largely fixed now except for those last two, at least for me.