I found this thread: http://lists.macromates.com/textmate/2006-September/013004.html
However, I do not use TM over a network, and I am not using projects, and this happens in both directions, leaving and entering back into the app.
Is there perhaps a way to disable the setting to have TM scan files for changes in case another app changes them? I could live without this feature, as I do not work on the same file with even cli apps.
Poking into defaults read com.macromates.textmate now, though I am not sure what I would be looking for.
Thanks again for any suggestions.