Here is an issue bug report for media file browser upload form in IE browser (7,8).
When we tried to add or edit an image field from our local, the upload made successfully, but we can not edit any text field anymore.
Here is the js error below:
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; MS-RTC LM 8; .NET CLR 1.1.4322; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)
Timestamp: Tue, 30 Oct 2012 06:11:27 UTC
Message: Object expected
Add plus, when we use the media file library to change the image, it works fine.