Hi,
I have noticed that in the admin section, whether I click on "Save" or "Save and Continue Edit", in any editor page, I am always returned to the list and never allowed to continue with the edit.
Looking at the code for FormValueExistsAttribute it seems that the comparison
filterContext.ActionParameters[_actionParameterName] = !string.IsNullOrEmpty(formValue) &&
formValue.ToLower().Equals(_value.ToLower());
always fails because formValue contains the TEXT of the button and not its value, so false is always returned.
I dont remember noticing this at home, where I use the latest IIS but here at work, using IIS 5.1 (Yes, I know but what can I say) it is a problem.
You might like to take a look.
Pete.