Microsoft found out just how angry birds can be following the somewhat premature pre-announcement of the release of Rovio's popular Angry Birds for Windows Phone 7.
In an attempt to drum up interest in its latest mobile operating system release, Microsoft's official website played host to graphics extolling the many virtues of the platform - including examples of the sort of apps that you'll find in the Windows Phone 7 'app store.'
Sadly, at least one of the apps appears to have been dreamt up: Rovio's Angry Birds, an iPhone and Android hit in which you play a series of peeved poultry attacking egg-stealing pigs.
No, it doesn't make any more sense when you've played it.
Although not mentioned by name, the immediately recognisable icon from the iPhone release of Angry Birds formed part of a graphic showing some of the apps that would be available to Windows Phone 7 users at launch. Initial excitement has been dampened, however, by a denial from Rovio.
Responding to queries from fans about the Windows Phone 7 release of Angry Birds, Rovio issued a statement: "We have NOT committed to doing a Windows Phone 7 version [of Angry Birds]." The company went on to explain that "Microsoft put the Angry Birds icon on their site without our permission" - a mistake which has now been rectified.
It's sad news for fans of the game, who are left under no illusion that a move to Windows Phone 7 from Android or iOS for their next mobile device will leave them without the distraction of Angry Birds - at least, for the time being.
Rovio has yet to confirm whether the up-swell of interest that the Microsoft gaffe generated has convinced them that a Windows Phone 7 version of Angry Birds would be a good idea.