Boston
Sorry to burst your bubble--
"rumor" is correct in the U.S.--
"rumour" (like "colour") is the British spelling.
Unless there is a copyediting error (or a quotation from a non-native written source), you won't see "rumour" in _The New York Times_, and you won't see "rumor" in _The Times_ of London.
Sorry to be picky-- occupational hazard
the Eye-talian babe on Eros i mean (no not the heavy-set Latina, and not the other one, but THIS one pictured here)
any info/experience/insider-trading? ... and before you go PC on my @ss, i can say "Eye-talian" cuz i'm part Eye-talian myself (Sicilian in fact so watch out! 
Czech ... i mean check
any girl who can spell "rumour" correctly has a special place in my anal-retentive spell-bound heart!
Sorry to burst your bubble--
"rumor" is correct in the U.S.--
"rumour" (like "colour") is the British spelling.
Unless there is a copyediting error (or a quotation from a non-native written source), you won't see "rumour" in _The New York Times_, and you won't see "rumor" in _The Times_ of London.
Sorry to be picky-- occupational hazard
