after upgrading Ubuntu 11.04 to 12.04 (x64 arch) maximizing or resizing GNOME Terminal (126.96.36.199) windows larger cause the Xorg (1.11.3) or X process to utilize 100% CPU. Resizing smaller, moving windows or minimizing do not seem to have the same impact but by no means are snappy either. I'm running on a Dell E6500 laptop (upgraded from 11.04) running the nvidia proprietary drivers v. 295.49 (Quadro NVS 160M) with compiz 0.9.7.8. Other terminals such as xterm/uxterm are unaffected.
Hoping it has to do with some configuration settings but not sure where to look (nvidia/compiz/gnome/X?).