Thank you for the question.
Indeed, we have reimplemented our RadMaskedEditBox control.
is a list of the changes made for Q2 2011 release.
Now at the questions:
1) RadMaskedEditBox does not allow you to write into the field if mask is empty. In case that you want to use it as regular text box you should set MaskType to None.
2) When MaskType is Numeric and the mask set is D - it allows you to enter only 1 digit. If you want more digits, you should use D(Number of digits), for example D7 - this will allow users to enter 7 digits.
3) I was able to reproduce this issue with Persian culture and currency mask in our Demo application. We will provide fix for it in our next SP release.
4) This notification icons appear only for Regex mask, IP Mask and Email mask - it means that the value inside the editor does not meet the validation rule.
I hope this helps.
the Telerik team
Register for the Q2 2011 What's New Webinar Week. Mark your calendar for the week starting July 18th and book your seat for a walk through of all the exciting stuff we will ship with the new release!