title: Blank WebResource.axd
body: <p>Have a rather large problem.  About two weeks ago I noticed that alert based validation (ValidationSummary) stopped working on my website.  Upon further review, WebResource.axd is coming back blank.  It's not throwing an error, just blank.</p>
  
  <p>I've tried tracing the request via Fiddler and Firebug, and the response is 200 at first. Subsequent cached requests (same page) return 304 (as I would expect).</p>
  
  <p>I've checked IIS configuration, web.config, installed updates, Global.asax, httpHandlers  etc... to try to find out what happened or why it's failing.</p>
  
  <p>I've been troubleshooting this issue for two days now and am running out of options.  Does anyone have any idea what the cause of this could be?  Any help is greatly appreciated.</p>