I am having an issue with Spark Client for Mac. Up until recently it had been working fine, but as of about 3 weeks ago it started having issues when recieving new messages. When a new message is received the window is blank. The user can close out of the message window and then reopen it and the message is there. This only seems to happen when new messages are being recieved. I tried removing and re-installing the spark client with no luck. If anybody has any light they could shed on this i would be greatly appreciative. The OS versions we are using are OS X 10.9.2, OS X 10.6.8, and OS X 10.8.5. Hope everybody has a good day.