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We recommend getting the baseline form working in IE 8 and then turning on features that you want to use one by one to ensure that they're operating correctly in your environment.
HTML 4 Compatibility
objQFESettings.HTML4Compatible = True
By default is FALSE to only output HTML5 content - set to TRUE if using Internet Explorer 8 or 9
Field Rules
objQFESettings.FieldAttributesManagerOff = True
Turns off field attribute rules. Likely should work in IE8, so you can reenable easily if needed.
Alt-Buttons
objQFESettings.HTMLHideDefaultAltDataButtons = True
Alternative data buttons are not well supported in IE 8
Auto-Centering
objQFESettings.AutoCenterFieldsOff = True
Turn off auto-centering to avoid excess javascripts running
iScroll (iPad movement and scrolling helper)
objQFESettings.iScrollOff = True
Default should be TRUE, but set it to TRUE just in case - iScroll is for iPad users
Calculated Fields Popup
objQFESettings.ShowCalculatedFieldPopups = False
Default is TRUE, set to False to ensure IE 8 works well then test to ensure the popups work well