Crash when saving preset of textbutton in toggle mode?

Ernest's icon

Reproducible?

1. Made a patch With nothing but a textbutton and preset object.
2. Set the textbutton to toggle mode.
3. Shift-clicked on preset object to save.

Max crashed instantly on Windows 64 with Max 6.1.5. Other objects not causing same problem, with preset save. What do I do? Delete all textbuttons?