Hi,

I've got a really unusual problem with a site that's been stable for quite a while.

Basically if you're creating content and using a MNTP to select associated content types it works fine for a couple of times and then the allowed content types won't load into the MTNP selection area and the site falls over.

I can't see any errors in the Umbraco tracelog or in the server event viewer.

I've done all of the standard stuff....republishing all content, rebuilding indexes, clearing cache, etc. but all to no avail.

I can't really say much more to be honest and I'm reaching out just in case someone somewhere has experienced a similar issue.

Thanks, C