We've been running owb 11gR2 in dev, test and prod environments. Dev and Prod are fine, but when I try to login to the test environment, OWB just hangs. I get just a white rectangle where the login window used to be. This normally takes a couple of seconds but then screen refreshes and I can explore projects or what ever I'm interested in. I've been in the test environment 1000 times with no trouble then as of today this started.