On 13 Nov 2010, at 14:39, Thomas Traub wrote:
[...] I used to indent with OPTION TAB and to outdent with SHIFT OPTION TAB, now SHIFT OPTION TAB deletes ...
This was an unintended change due to the updated code for deciphering key events.
For now open TextMate.app/Contents/Resources/KeyBindings.dict and add this binding:
"~$\t" = "shiftLeft:";
This will restore “shift left” to ⌥⇧⇥.