Haven't seen this before, and a refresh took care of it. But it looked like the advanced editor menu was building all in one spot. Screen capped it to preserve the moment.
OS (Win XP home ed): Verion 5.1 (Build 2600.xpclnt_qfe.010827-1803).
Browser (IE): Version 6.0.2600.0000.xpclnt_qfe.010827-1803)
OS (Win XP home ed): Verion 5.1 (Build 2600.xpclnt_qfe.010827-1803).
Browser (IE): Version 6.0.2600.0000.xpclnt_qfe.010827-1803)