We have spent the last two days testing some Ajax updatepanel web pages and they have been working flawlessly. This morning, for some reason, we started getting an error on the above line of code. We have changes neither the code nor the pages for any of these pages since last week (because they were working flawlessly). I have not received a response from the web host's tech support yet, but I was wondering if anyone code give me some ideas on what to look for that might have changed on the web server.
Also, if anyone has any ideas on how to correct the problem in the elements over which I have control. I tried setting EnableEventValidation="false" in one of the pages, but that didn't seem to help. There is very little information available on this error.
pamela