I am going to toss this one back to you with the following thoughts
IE version 8 shipped when?
LoadRunner version 9.0 shipped when?
Given the gulf between the ship dates of the two products what would be your working hypothesis as to the level of official support for the integration of the tools and whether there was even any possibility of the two products being tested together for a supported configuration?
If any support is available officially would it not then be available most likely on the release in general distribution available at the time of the release of IE8? And perhaps then a patch might be required....