When the radCheckBox is disabled you can not see the check mode on breeze theme.
This bug was handled at the new version of telerik.
I have a custom theme that I need to fix.
What are the changes that have been done at the style of this control?
I can confirm that RadCheckBox does not behave correctly with previous version of the theme (for example with 2012_2_912_00 Q2 2012 SP2). However, this issue is already fixed in our latest control version. You can either use the latest version or you could use the Visual Style Builder tool, If you want to modify your custom theme. For your convenience, I have prepared you a sample video (2013-02-14_1905).
In addition, find attached my test project and the modified version of the Breeze Theme.
I hope that you find this information useful.
All the best,
Plamen
the Telerik team
Q3'12 SP1 of RadControls for WinForms is out now. See what's new.