When running "epm --verify NAME" as a normal user, there are sometimes files that we don't have permissions to read. In this case, epm should output a '?' to indicate that it doesn't know if the md5 checksum matched or not. It currently outputs an error from the md5sum command and then outputs a '5'. I'll append a patch that makes this work like the real rpm.
Created attachment 6780 [details, diff] Fix --verify output of unreadable files
Fixed in 0.8.2, now in portage.