The next step will have to be a completely fresh installation, I think. I hope I don't lose my syntax colouring. I'll let you know how I get on.
I did a fresh installation - deleted preferences, new copy of Textmate. There was no Textmate bundle. I'm beginning to wonder if I'm missing the point. Is there really a bundle called 'Textmate' that shows up in the Bundle menu/Bundle editor?
The reinstall re-enabled 'Language Definition', which had also been disabled, so now I've got my scope feedback back. But no TM bundle. Does it matter?
Bruno