Hi,
I have SharePoint 2010 setup and works fine until today all of a sudden it throws error "The security validation for this page is invalid" when delete a SharePoint document or list item.
There is no custom event handler deployed on library/list, and it should not be account issue as the same account works yesterday, and even after I turn off security validation from Central Admin, it still doesn't work.
The only change I did is turn off Dynamic Compression from IIS, after that I tried enable back Dynamic Compression but it still doesn't work.
Does anyone know what could be the possible reasons? Thanks in advance.
