Any Magento people in here?

I'm having a hell of a time with a new Magento site, to cut a long story short, when you edit certain products in the catalog and hit Save, it shows the "Please Wait" popup and hangs. Other products work. It seems to be configurable products that give the most trouble, but there's one that works, so maybe that's a red herring.

Now the site was developed on Linux, and is now being hosted with WAMP on Windows. I suspect htat's where the problem lies.

I've run Charles to view the requests it does and when it's working it does a POST that returns 200 with {error:"false"}

When it fails that POST doesn't get a response code, and the response is also blank.

I didn't develop this site, the original developers have washed their hands of it, and I don't know Magento.

Maybe it's a server setting issue though, and not really Magento specific... any thoughts?

in case anyone stumbles on this one, it seems that we had the "Features" attribute set to unique (by mistake, no need for it to be unique) and turning that off fixed the problem.

It would have been nice if Magento had been a bit more helpful in fixing that problem than just hanging. :swear: