Welcome to the online forum, I am sorry to hear that you are having a problem with your screen flickering and constantly minimizing and enlarging. It sounds like the slingbox may have take the update incorrectly. I am going to post a article or two under this discussion about a few ideas that might get that fixed for you, If you could let me know what type of operating system and what browser you are using would also be a very helpful piece of information for trying to trouble shoot that unit.
- Restoring your Slingbox to factory settings
Hope this helps,
Sling Moderation Team