I've a web page with webparts on it. It works fine - basically it is taking a donation.
If the web page is in "edit" mode however Page.IsValid is false and it won't submit the donation.
I can't find any message or information about what is failing validation. I've tried putting a ValidationSummary on the page - it shows nothing.
I've tried removing all the validation I can find in the webparts - still fails.
Any ideas on how I can find what is causing Page.IsValid to be false?