San Jose, California - Apple Inc is urging some iPod and iTunes users to hold off on upgrading their computers to Windows Vista, warning that the iTunes music software may not work well with the new operating system from rival Microsoft.
Apple said iTunes may work with many Vista computers, but the company knows of some compatibility problems and recommends that users wait until it resolves the issues with an iTunes update in the next few weeks, the company said in a statement provided on Friday by spokesperson Derick Mains.
The iTunes software is key to synching music on computers with iPod portable players.
Microsoft launched Vista, its first major overhaul of Windows in five years, on Tuesday.
Though Microsoft and Apple are partners in some cases - iTunes works with Windows PCs and Microsoft Office has a version for Macs - the two are also entrenched rivals.
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According to a notice posted on Apple's website, compatibility problems include the inability to play music or video purchased from the online iTunes store, difficulties synchronising contacts and calendars and possible failures of iPods plugged into a Vista computer.
Apple also outlined precautionary steps users could take to try to minimise any problems should they upgrade to Vista now.
Adam Anderson, a spokesperson for Microsoft's Windows division, said the company did not believe iTunes users "should stop using Vista for these reasons".
The company says it is working with a long list of partners, including Apple, to make sure their software is compatible with Vista.
When the new operating system launched, Microsoft claimed more than 5 000 hardware and software products were already Vista-compatible.
The company has a dedicated team working with Apple on getting iTunes running smoothly on Vista, and it will keep at it "until they have the program running to the quality level they're shooting for", Anderson said.
Apple has sold more than 90 million iPods since the product was launched in October 2001.