SEGA has told Eurogamer that the PS3 version of Sonic Unleashed has been pushed back to an unspecific date in December.
However, all other versions - Xbox 360, Wii and PS2 - will launch as expected on 28th November.
The publisher also doused speculation that the European release of Sonic Unleashed would be sub-standard in comparison to the delayed Japanese version, which was apparently held back to improve quality.
"Some fans living [outside of Japan] have become concerned that there will be a difference in quality between the version of the game released in Japan and the version released outside of Japan. This is not the case and we apologise for this misunderstanding," a spokesperson for SEGA told us.
"The difference in the international release dates is based on the sales strategy and the manufacturing schedule. There will be no quality difference between the North American/European/Asia release and the Japanese version. Please be assured we are doing our best to deliver a top quality experience to people all over the globe."
The spokesperson added, for all of our Japanese readers out there: "We still cannot announce the release date in Japan, but we should be able to do so shortly. Our apologies to Sonic fans in Japan, who we must ask to wait a while longer."
Sonic Unleashed has kept a low-profile since being announced back in April, when we were promised a return to the roots of the hedgehog series.
We're not sure if this is a bad omen, but we've not got long to find out.
Head over to our Sonic Unleashed gamepage for all of the information and media released so far.