Gedit Undo Shortcut issue: change Ctrl+Shift+Z to Ctrl+Y

The ultimate solution:
Go to:
http://empty.23inch.de/pmwiki.php/Main/EditShortcuts
Download the tgz and install (Put the editshortcut.gedit-plugin file and the whole editshortcut directory into ~/gnome2/gedit/plugins. Restart gedit)
Edit>Preferences>Plugins: Edit Shortcuts (tick)
then
Tools>Edit Shortcuts:
GeditWindowAction->EditRedo: change to Ctrl+Y

Sometimes, open source is passivity

About a thunderbird bug: cant drag and drop file FROM tb TO folder/desktop for 4 years now, since then, a bug has been filled, water has flown under bridges, but I’m still unable to DnD…..
https://bugzilla.mozilla.org/show_bug.cgi?id=377621