Instability problem using QTP 10.

[Saket]

Its really strange that sometimes it works and sometimes not.
can you point at some specific peice of code where such problems occur and paste.
what are the controls for that you get an error, does its properties different from what you see in IE6/7 than IE8?
One more thing did you converted your scripts while opening the script in QTP 10. You should open all your scripts in QTP 10 and convert it when it asks for.