I'm working with an existing web app that was developed under IE6 then the users upgraded to IE7.

Most pages still run fine, but there are a couple which get "cannot disply the webpage". However, on my PC which is also IE7, I do not get the error.

Any suggestions where I can start looking for the differences between PCs where it works and PCs where it doesn't? My customer has a supplemental laptop to run IE6 to do the functions that he can no longer get to on IE7!

Thanks.