From time to time my users are seeing the random error after applying UR2.

Microsoft Dynamics CRM Error Report Contents

1.0

'null' is null or not an object
61
/userdefined/edit.aspx?_gridType=2&etc=2&id={56F40A92-2C26-E311-940E-005056AC3175}&pagemode=iframe&preloadcache=1380577261229&rskey=339561644
/userdefined/edit.aspx?_gridType=2&etc=2&id={56F40A92-2C26-E311-940E-005056AC3175}&pagemode=iframe&preloadcache=1380577261229&rskey=339561644
onclick()

onclick()



Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET4.0C; .NET4.0E; MS-RTC LM 8)
en-us
en-us
en-us
1280x1024
Web
2013-09-30T14:41:04


1033
1033
1033
1033
{4205B694-09CF-E211-9E02-005056B9001C}
{B656A8FC-4022-E311-940E-005056AC3175}
5.0.9690.3557