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    Hi,

    recently on one of the websites(IIS environment) I started getting this error

    The specified CGI application misbehaved by not returning a complete set of HTTP headers.


    I restarted IIS and the server but without luck. A couple of days later I started entering exit break points in the index.php file and this lead me to the siteCache.idx.php. Seems like the cache file was the one causing the problem.

    I ended up discovering that the new generated siteCache.idx.php(if you remove the old one) is not liked by the system but the moment you open and save the file(without changing a thing) evrything starts working again.

    Weird stuff!

    Any ideas what could be causing the problem? I suspect a CGI issue or not having the lates php. I'm planing to upgrade and possibly run PHP in ISAPI mode