Hi Juraj,

Thanks for your reply! I spent a lot of time yesterday debugging this issue, then somehow it solved itself out overnight. I'll include more information here in case anybody else runs into this.

We're running a Kentico 5.5 R2 site with no hotfixes. The problem in CMSDesk is that a lot of the javascript/ajax functionality suddenly stopped working -- for example, we could not expand the content tree. After debugging I realized the problem was the WebResource.axd handler was throwing a 404 error.

I soon realized the problem happened just after I made changes to the URLs and SEO settings -- I was trying to allow extension-less URLs. We did not make any changes to the web.config since the required IIS settings were already in place:

http://www.kentico.com/docs/devguide/index.html?custom_url_extensions_iis7.htm

But I did change some of the settings, and I'm guessing I broke the Kentico URL rewriting somewhere along the way. We have a staging server where I had imported the same site just a few days earlier, and this staging environment never had any problems.

Yesterday I rolled back all my changes to the original settings. I tried restarting the application and recycling the app pool but it was still broken.

When I woke up this morning it was working properly! There was some server activity and a Windows Update in the middle of the night but the server did not restart.

Anyway, if this happens again I'll post more information here. Thanks again for your help,

Mark

Quick update. This problem came up yesterday in a different Kentico site we're running (on a different server). I decided to wait until this morning to look into it, and by the time I did, it had already fixed itself.

So all my suggestions from the previous post (re: URL rewriting) are probably wrong. I'll post more information here if it happens again.