oh well it is qios because i never have issues till i started using it - looks good but damn it has bugs
I had this issue in the past when developing with Windows Forms... The solution that I was find is set the minimum size and maximum size to a fixed value inside the form. This issue probably is from your custom controls inside a new version of the Visual Studio, I was using the Infragistics for .NET 3.5 when it made.
I have had similar issues. It seems to be when you have the designer open and also edit the code at the same time. Try closing the designer tabs before doing any code changes.
well i run vs2012 pro and i have had issues even without the designer tabs being open - seems a clean fixes it