Binary package hint: empathy
This is in Maverick installed from a daily build just before RC.
Mousing over a contact in empathy's contact list displays a solid black background for the contents, and a transparent black background for the border, as seen in the following screenshot:
https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/656000/+attachment/1675956/+files/Screenshot-1.png
This is a regression from Lucid, where the contents had the same transparency as the borders of the tooltip. This is different from bug #538293 which refers to how display pictures with transparency are rendered in the tooltip. This is different from bug #656000 (from which the above screenshot link was borrowed) which deals with two different issues, and does so from an aesthetic point of view, but this bit is clearly a regression run into by mistake.
ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: empathy 2.32.0-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Thu Oct 7 06:03:51 2010
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Alpha amd64 (20100921.1)
ProcEnviron:
PATH=(custom, user)
LANG=en_GB.UTF-8
SHELL=/bin/bash
SourcePackage: empathy
Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 538293, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.