Microsoft accidentally listed the pricing of the high-end consumer versions of Windows Vista on its Canadian website yesterday.

The site posted a price list for Windows Vista Ultimate and Windows Vista Home Premium, but the page was pulled soon after news.

According to, Windows Vista Ultimate was listed as costing $499 Canadian dollars -$450 US dollars or £237 - while Home Premium will be $299 Canadian dollars (£142). An upgrade to Vista Ultimate will cost $299, while an upgrade to Home Premium will cost $199.

Microsoft acknowledged that it "inadvertently" posted Windows Vista Canadian retail prices. It plans to reveal the official US pricing for Vista when it makes available the first release candidate of Vista sometime before the end of September, the software giant said.

Windows Vista Ultimate will includes all of the multimedia capabilities currently available in Windows XP Media Center Edition, as well as a new 3D graphical user interface called Aero and security features that make it a good fit for small businesses as well, according to Microsoft.

Currently, Windows XP Media Center Edition retails for about $320 or more per copy, so it's no surprise Windows Vista Ultimate will be more expensive than the highest-end consumer version currently available.

Windows Vista Home Premium will also include Windows XP Media Center Edition's multimedia functionality, as well as the Aero interface. If the Canadian pricing of the OS is akin to what the US pricing will be, it might be a better deal than the comparable version of Windows XP now available.

Microsoft has said it plans to urge customers to purchase premium versions of Vista in favour of Windows Vista Home Basic, the entry-level version for US consumers.