I’ve had a problem with my styles not being applied after AJAX calls. My styles were not in the < HEAD> section of the page, and they were only recognized by IE on initial Page_Load.
If you know of any other ways to fix this problem, post them here.
This is more of a reference, hope this helps some people.
After doing some Googling, I found out that moving my styles into the < HEAD> tag of the page fixes the problem.