PHerison
(P Herison)
5
OK, last chapter and then I give up. 
Today I got the same problem on my Office-PC (also Vista and same FF):
Loading tiles took some time and the I got the error-image. Closed Firefox tried again and the error-images were still there.
Now the strage part: Closed FF. Cleared browser cache without hope but… After starting FF again, the error-images were gone. I could continue editing like before and see all Yahoo-Images. Even these tiles that has errors before.
I tried the same here at home (again) but the appearence of the area mentioned in the link above is still the same. D***!