I am using IDEA 4.0.3 #1181.
In my project, I am using JDOM library. I have included it into my project settings paths as a jar file into "Used Project Libraries".
In "Configure Project Libraries" dialog, I have also included the source code of this library with "Attach Sources".
When I do CTRLB of CTRLleft-mouse-clic on a JDOM class, it shows me the decompiled source instead of the real source I have included.
Seems there is a bug or I have not configured my library correctly.
Thank you for your response.