The testcase applet included in this bug reports attachments will cause an OutOfMemoryError when it is reloaded 2 or 3 times. The applet writes diagnostice information about the current memory levels in the Java Console, so it is important to keep the console open to see these messages as well as the error message.
  There is a file in the test cases's ZIP file called MemoryProble\readme.html which will describe how to run the test case.