Tested on Winodws 7 Enterprise, 64-bit; java 1.6.29, 1.6.30, 1.7.0; jmol 12.2.14, 12.3.14 and 12.2.0.
Exception when trying to open console (both from menu and by right clicking in window):
"AWT-EventQueue-0" java.lang.Error: Cannot call invokeAndWait from the event dispatcher thread
Problem was fixed when I deleted the history file in C:/Users/[user]/.jmol/. Deleted file attached. Error reappear when restoring history file to the bad version.