We're a relatively new user of K2 Blackpoint (BP) as well as Sharepoint 2010. Not surprisingly we're still getting our ducks lined up.
My observations to date are that IE8 plays nicely with BP workflows, Firefox does not and neither does Chrome. Safari use is too minor to consider.
What I need to know is are there any browser constraints on the K2 side of the equation, or is Sharepoint where the issues lie? I've had to get users to install IE8 on their machines to gain access to BP processes (e.g. a Code of Conduct policy survey) in order to make things work.
Thanx in advance!