when i right click ( upper pen button on wacom intuos p&t default mapped to right click) the fav brush/color menu appear and immediately disappear.
it works perfectly fine on the linux version but in win 7 64bit it just flashes. though if i hold the button it appears to stay, but then wont let you select anything except a color from the triangle. ( not the past colors )
side note: normal right click with mouse works fine.

is there any fix or work around for this?

Posting this again here for easier reference:
If you're using a Wacom tablet, there is a workaround in the Wacom Tablet Properties (have the tablet plugged in and Krita open for all the proper settings to be availible).

In the meantime, this bug is on our list of 2.8 release blockers...