We've just issued version 2.6.1 of K2 which fixes a few minor bugs reported from our users in all Joomla! versions supported by K2.
These bugs are either "notices" popping up in various places in the backend or style related glitches. So far we've sorted what's been reported, but hey, Joomla! released 3.0.1 just yesterday so don't be surprise for a 2.6.2 in the weeks to come ;)...
The great folks at OSTraining.com - the premier training company on everything Joomla! related - have created a new series of video tutorials for K2. As part of their new "Joomla! K2" training class, OSTraining.com instructor Vicki Watson will walk you through K2 in three parts.