I had TitlePage50 from the welcome module open in the editor.  I had a CVS
update of my whole checkout running in a command shell.

When CVS updated TitlePage50, a dialog popped up asking if I should reload it
because the file was externally modified.  The dialog could not be closed and
the AWT thread seemed to be permanently blocked.

See attached thread dump.  Error Annotation Queue is in javacore exclusive
mutex, waiting for a read lock on the edited Document;  the AWT thread is
waiting to enter javacore exclusive mutex;  hints request processor is also
waiting on the document read lock;  what looks suspicious is that the dialog was
displayed from GuardedDocument.runAtomic() - I don't know for sure that that's
the deadlock, but it does involve code that synchronizes on BaseDocument...

See attached thread dump.