On my system (IDEA 4.5, Mac OS X 10.3.4, JDK 1.4.2_03), IDEA cannot resolve the symbols of any libraries I have added to my project, such as the JavaHelp and JMF libraries. On Mac OS X, the JavaHelp and JMF jar files are not installed to any specific location by default, so I've put them in ~/Developer/Java/ and created IDEA libraries to access them.
The libraries and their included jar files show up in the Project view, but any use of a class from those libraries is still marked as an error in the editor with 'Cannot resolve symbol'.
I'd appreciate any help with this problem. Thanks.