This could be classified as a combination of a suggested improvement and bug fix, and relates to the matisse swing gui
builder.

I have a custom component that extends 'JPanel' called 'MsgPanel', and when I try to add it to a component in the gui
builder, I get an error dialog "The component cannot be instantiated. Please make sure it is a JavaBeans component."
This seems to be due to some classpath issue, as the component has a default constructor, which runs outside the gui
builder without throwing an exception. (I think the problem has something to do with the fact that I am using cglib in
the project to add property change support to javabeans on the fly.)

I suggest that the error dialog should have a "details" button yielding a stack trace of what caused the error. (Or
maybe the error should be reported in the bottom right like other errors in the ide.) The reason I suggest this is that
I have been facing this problem with a lot of custom components, and debugging the issues is difficult without more
information on why they occured.