Comment 4 for bug 176185

I've read the comments and would like to see an update for Gutsy, too.
But it's not a Synaptic bug.
And I believe the particular issue you are seeing won't be fixed with gimp 2.4.2.
But according to your bug title (and not the description), I'm marking it as duplicate of bug 157642, which is about updating Gimp in Gutsy.
I hope it gets updated for Gutsy soon and that it will fix your issue.
Please note that it won't help to add a "me too" to the bug.

If you feel adventurous, somebody has provided a backport in his personal package archive: https://edge.launchpad.net/~bruce89/+archive
There's also a backport request at bug 164795.