You should have looked at the "Details" tab, it explains which dependencies are missing.

Since other apps have had auto-builder issues, prompting the dev to revert changes, I'm guessing some code/packages are being built with system libraries which will be made available once the next firmware update comes out (PR1.2), and until such time -- since those libraries aren't available for normal download, they come as a full "suit" (firmware upgrade) so as to ensure compatibility -- apps compiled against those are uninstalable by anyone who is still running PR1.1.1 (3.2010.02-8).

Though it'd be really nice if matrim would comment on the matter. (btw, matrim, must have missed your first post -- no call duration on the database, eh? that's a real shame and a huge thing that the devs overlooked)