Binary package hint: metacity
The resize window area is overlaying with some buttons. It happens in Gnome (No effects) so it's not related to compiz. To reproduce, open "Appearance" and switch back and forth between themes. You'll see that the resize windows area comes over the "Close" button. This happens in other instances using other applications but this is the first example that came to my mind. I will try to post other occurrences of this issue. See the down right corner of the screenshot, the edge of the Close button.
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: metacity 1:2.30.3-0ubuntu8
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
Date: Mon Jun 6 17:25:26 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427)
ProcEnviron:
LANGUAGE=en_CA:en
LANG=en_CA.UTF-8
SHELL=/bin/bash
SourcePackage: metacity
UpgradeStatus: No upgrade log present (probably fresh install)
I've found another example. Shotwell properties. See screenshot.