If-None-Match

[CoreyAlix]

On some IE browsers I am finding an "If-None-Match" attribute in the GET header of a REST request:

GET /arcgis/rest/services/VegasTiles/MapServer?f=json&test=test&callback=dojo.io.script.jsonp_dojoIoScript1._jsonpCallback HTTP/1.1
Accept: */*
Referer: http://usrcvqa8/DP_ORA2823_CRM/CustomerService/ServiceRequestMapLookup.aspx?PID=gzAju9gp5Z0fPe/jn17S...
Accept-Language: en-US
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; .NET4.0C; .NET4.0E)
Accept-Encoding: gzip, deflate
Connection: Keep-Alive
If-None-Match: 210828728
Host: usalvqa1

This results in a 304 response with no json body and a javascript error.  Is there any way to supress the If-None-Match header?

[CoreyAlix]

Disregard this request...the bug is elsewhere in the javascript.  Because it is compressed it is difficult to step through.