I have a few pages in .Net 4.0 website that use the NumericUpDownExtender. I have some validators on the textbox fields (tried different types of validators), and when there is an error in the field, the cursor jumps to the field, but the validator's error mesage is not displayed, so the user doesn't know what's going on - the form is not submitting, but no error is displayed. The site is asp.net website using a master page with an update panel containing the content of the child pages. When I view the source of the page using Developer Tools in IE, I can see the validator's <span>, but the style="display:none" is there, so it's not being set properly on error. Any ideas?
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