I have the latest build. 2010 Q2 SP1.
I have an issue wtih the RadNumericUpDown minimum property. Let's say the minimum property is set to 5 and the Value Property is bound to an object that has not been set yet. The control appears initially with a value of 0 and you cannot change it using the updown buttons since moving it up does not meet the minimum value.
Here is my xaml: