Forefront TMG 2010 and problems with Internet Explorer 9
After upgrading to IE 9 your TMG2010 can show you a lot of problems like below:
Below solution from Evgeniya Kotovich:
do backup of file:
edit this file and search for 3 lines with "paddingTop"
put "//" before m_aPages
save file anc check, should work
Below full link to forum: