Share to Vimeo doesn´t accept password (FCPX and Compressor)

As of some days, I can´t share to Vimeo anymore.
Dialogue box says "Invalid email address or passowrd"
Is anybody else having this issue?

I tested it on two different systems with two separate installations of FCPX.
And on both systems it worked before.
It doesn´t work in Motion, too.
I CAN share from Quicktime Player X though, so vimeos API should be ok an I think I have to look for the error in FCPX´s implementation or my system setup regarding FCPX.

And I already posted in the vimeo forums but the (fast) reaction was to get support from FCPX.
Though that still doesn´t rule out an error on vimeos side at least it tells me it´s not a common API problem (as some years ago)