Hello again and thank you for investing your time!
The complete crash is definitely true for FlashPlayer 8.5 beta2 - with this
version IE completely crashes with the following message (trying to translate
from german...): "IE has detected a problem and will quit now".
With Version 8 I get the message you normally see when encountering an
infinite loop - which might be right what's happening: as far as I can tell the
script executed at this time loops over the input data and generates an
exercise (see
http://www.creative.co.at/flashproblem/ludus1.jpg for a
screenshot) by attaching and positioning textfields and library symbols (using
createTextField and attachMovie) word by word, taking care of generating new
pages (=container movieclips) when needed. The position is calculated based on
the width/height of each (autosized) textfield. My guess is that in some cases
flash supplies incorrect values for the width/height (possibly infinity or
undefined) and therefor my calculation fails, leading to an infinite loop.
What makes me think that this is not mainly a problem with my code but with
the plugin itself is that the problem ONLY occurs when using IE with Flash
Player 8+ and only when opening multiple browser windows with a flash control.
These are circumstances I don't even know about in my flash code...
Since the application has been used by several thousand internet users in the
last 2.5 years, I'm quite sure our customer would have informed us if this
behaviour occured with other browser-player-combinations too.
Br,
Harald