In the last few days my macbuntu installation is randomly not loading the window borders and tools (borders, min, max, close buttons) when I boot the computer. So, when I open an application it stays locked in one position, can't be moved, minimized, etc. To solve the problem, I have to reboot the machine until the windows appear again. Please, advise if there is a solution. Thanks.
It is possible that compiz settings are corrupted. After boot, when the window frame disappears, do the following command:
nohup compiz -replace &
You can try to reset Compiz settings to default profile, open CompizConfig Settings Manager, go to Preferences and reset profile to default values by pressing "Reset to default".
nohup metacity -replace > /dev/null &
gconftool-2 -recursive-unset /apps/compiz
nohup compiz -replace > /dev/null &
Here is my Compiz profile if you want to restore default Macbuntu settings, works on Ubuntu 10.04 and 10.10: http://www.losoft.org/blog/download/macbuntu/compiz-profile.tar.gz
You can always move the window using Alt key and mouse