The fix of bug #159528 has introduced a new error: SRC_URI now lists the same file twice under different names, UrbanTerror32.zip and urbanterror32.zip. The latter should have an uppercase 'U' as well, otherwise it is being downloaded, too. BTW, it's not a stupid mod, it's actually a pretty good one. :-)
*** Bug 163102 has been marked as a duplicate of this bug. ***
Fixed in CVS