If you have installed ‘xmodmap’ you may add the following command in order to have reversed scrolling experience like in OS X Lion:
echo "pointer = 1 2 3 5 4 6 7 8 9 10 11 12" >> ~/.Xmodmap
The next time you start ubuntu gnome desktop it will ask you, whether it should load the xmodmap (you should add the .Xmodmap file). There you go.
With the update to karmic koala ubuntu reversed the color scheme of context menus. Before the foreground had been dark and the background bright. Now, guess what, it’s the other way around. With this change, the property for showing icons in context menus has been disabled, too. This is due to transparency problems. Unfortunately, programs like eclipse make extensive use of this feature. So, not having these icons anymore is more than annoying.
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The cyrus imap server in version 2.2 has a weired behavior: By default an admin user is not allowed to delete mailboxes he created. The good news is, he is allowed to give himself the right to do so. Read More