Yeah, I've reverted back to the tag mentioned above, and all is working again, thanks for posting the tag so i didn't have to go looking!, will wait till this issue can be rectified before upgrading.
** If your running your qbit on a manually specified network / ip hold off updating or revert back to the tag mentioned by Gex2501 (:4.6.5-1-05) **
*** If your running qbit on the typical bridge network then in theory you might be fine either way (updated or not) ***