Buttons don't appear correctly, 32-bit addressing
On some Macintosh computers (such as the IIsi, IIci, LC, LCII, and older PowerBooks), the Memory control panel gives you the option to turn 32-bit addressing ON or OFF. This should be turned ON for Reunion 5. If it is turned OFF, check-box buttons and radio buttons won't appear correctly, and you'll probably experience other problems.
NOTE: This was fixed in maintenance update 5.03.