Share your experience!
After updating to ICS..my instagram camera is showing less than a quater of the viewfinder...the rest is blank 
Try reinstalling..no success:smileysad:
I'm having the exact same problem. Tried everything possible and nothing, still the same. 
http://talk.sonymobile.com/thread/57339?start=10&tstart=0
It is not the best solution, but at least it works. 