I am implementing WebCalendar for posting some events, and have found that a blank summary is replaced with "font size=", which blows up IE7 popups. IE7 returns a runtime error, and then complains with:
idiv.style is null or not an object
This error occurs when you mouse-over the title on the month.php page, and blocks the user from getting into the entry to make changes. The work-around is to use Firefox to remove the "font size=" from the summary form, and re-save the entry. I'll keep you posted to let you know if it is the FCKEditor which is causing the problem.
With a little side of applesauce...
©2006 Shannon Eric Peevey