that command is missing in my bundles. Could you post it here?

It should be included. Is your version of TextMate up to date?

Yes, I think so. It's 1.5.5 (1368)

I've searched all bundles manually and via Ctrl+Apple+T - but no "Jump to..." existing.

Then I've download a Trial version, extracted the commands and used them to update my bundles - no success.

Hm...