Haris,
thank you for your hint, this solved the probelm I guess. I have not been using \ref since I am using a mixture of \vref and \prettyref instead - which both did not have a scope of "meta.label.reference". I just recently added those commands to the grammar and now it works fine with alt-esc. The "old" completion gives me the following output on console.log:
Mar 26 01:45:47 dekayBase crashdump[724]: bash crashed Mar 26 01:45:47 dekayBase crashdump[724]: crash report written to: / Users/dekay/Library/Logs/CrashReporter/bash.crash.log
and within TextMate I get:
47:68: execution error: System Events got an error: Die Liste ist leer. (2)
I am using a svn checkout of the bundle -
e181090182:/Library/Application Support/TextMate dekay$ ls Bundles Conventions.txt LICENSE Themes Tools
Dan