I totaly agree with you. The bugzilla contributions seem to count much less and other forms of contribution are counted to much.

If I have a look into my actual karma count I see:
82 point for t.m.o thanks
89 points for mediawiki edits
64 point for bugs reported in bugzilla

If I ask myself how I invest my spare time into mamo.org I would answer I am using 70% of time to report and handle bugs and I also invest much more time into t.m.o than into edit pages in the wiki.

Beside of this I think a wiki edit is more worth than a t.m.o.

All in all bug reporting / triaging should bring more points. I don't need much karma points but there should be a signal to everyone who is willing to invest time into th maemo community: "Reporting bugs is important and a good way to get karma points." At the moment the signal is: "Post as much as you can to t.m.o."

Just my 2 cent...err karma points