This seems to have been fixed by sistopy:
pugs (6.2.10-4build1) dapper; urgency=low
* Rebuilding for registered/unregistered change of ghc6 on
amd64/sparc.
** Changed in: pugs (Ubuntu)
Status: Confirmed => Fix Released
--
[UNMETDEPS] pugs has unmet dependencies
https://launchpad.net/bugs/65401