[Orgmode] [OT] M-x not working anymore

[Markus Heller]

Hello all,

this is OT, but I'm really baffled right now.

M-x doesn't work anymore!!  The M key works, e.g. M-w still does what
it's supposed to if a region is active, and I can use ESC x instead.

But M-x just refuses to work, neither in an orgmode-file, nor in my
.emacs, nor in the *scratch* buffer.

I'm *positive* I didn't change anything in my .emacs or elsewhere, and
this is specific to M-x.

I'm using emacs 23.2.1 on Win 7 64 bit Enterprise.

Any ideas as to what's going on?

Thanks and Cheers
Markus