I have been working with Dave Ambrose Last PM said :
"
Sent 19 August 2011 - 12:08 PM
Thank you for this information. I've been trying to tell Invision's tech support that our problems are specific to users, and not to browser/computer combos.
I'll open a problem ticket, or add yours to an existing one. We're working our way through these problems. It's going much more slowly than I'd like. I'll try to tackle these next week. "
I have some issues here and its NOT one OS / Browser or combination..BUT Dave is working on it so we do have hope.