[TxMt] Xcode ext.editor issues

[shin kurokawa]

Assigning Textmate as the external editor, it works
as expected for several projects. Double-clicking
on a file name within Xcode will open it in Textmate.

Then all of a sudden, files clicked in the Xcode
project menu no longer open --- instead
Xcode will pop up an error message saying
it cannot find the files and the "perhaps it has been
moved" thing.

If I then disable Textmate as the external editor,
everything will work fine again.

This does not happen if I assign BBE instead
of Textmate.

Perhaps I've missed something.
What am I doing wrong here?

-Shin