In IE8 (in both view type) in my case "empty style" error in line 2539
For me work fine this 2 changes:
line 2418: if (offsetParent && typeof(offsetParent.getStyle) ==
'function' && offsetParent.getStyle('position') === 'fixed')

line 2539: var value = false;
add after 2539: if(typeof( != 'undefined') value =[style];

maybe it will be usefull for someone of You.

P.S. sorry for may poor english
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