I have added a 0 in the first line as you say 11,000 later. I found many versions back that performance does tail off at a point which is a combination of sheer number of files and images. For me I found 4/5,000 was the point to split so 11,000 causing issues does not surprise me.
This will sound whacky but I had a problem a while back where a dialog took ages to come up. Then one day while waiting I idly clicked the mouse over a blank area of the task bar, it came up instantly.
See www.grainge.org for RoboHelp and Authoring tips
