More info for you....
I've got two saved listings in my Anchorseal folder. Go look at them. This is what happens with either:
If I try to edit:
"Loading..." appears, then goes away, and gives me a blanks screen.
If I try Schedule:
Screen simply goes blank.
If I try Preview:
Nothing at all happens. Screen doesn't change.
If I try Create Similar:
This seems to work fine.