Visual Studio 2008 IDE Freezes/crashes When Opening .aspx File With Css Included

Visual Studio (SP1) runs fine until I try and view .aspx source files with the lines

<style type="text/css">
</stlye>

anywhere in them, upon which it freezes (i.e is totally unresponsive) and I have to use the task manager to shut it down.

I have read a lot of questions about Visual Studio 2008 crashing on viewing some source files. However, I still can't fix this problem.

I have systematically deleted and re-included all other code and it comes down to these two lines, which is very confusing. Sometimes it happens as soon as the lines are added, sometimes it doesn't freeze until I build the solution with any of the problem pages open. I can add external style sheets, and it only started recently.

I had Resharper 4.5 installed and have since uninstalled it, and do not have anything else installed.

Also, it happens to other people with the same source code, and re-installing Visual Studio does not fix the problem. So I have several questions:

Is there any way I can find out what's happening? I don't understand how the code (the css tag itself) could crash Visual Studio, and am thinking that this is unlikely and it must be something else within my solution, would this be a safe assumption? Could this have anything to do with installing Office 2010?