The iTunes program is key to synching music on computers with iPod portable players, and the latest version, iTunes 7.1, comes a month after the iPod and Macintosh computer maker warned PC users against installing Windows Vista until Apple could fix the problems.
Apple removed that outright warning from its Web site on Monday and stated instead that the updated iTunes is recommended for use with most editions of Windows Vista.
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But Apple also conceded that some glitches, including possible corruption of a user's iPod player upon ejection from a PC, remain.
"Apple is actively working with Microsoft to resolve a few remaining known issues," the posting stated.
Apple representatives declined further comment and would not say how much longer users would have to wait for iTunes to be completely Vista-friendly.
According to the notice posted on Apple's Web site, the previous glitch that prevented Vista users from playing music or video purchased from the online iTunes Store is no longer an issue.
But in addition to the iPod-ejection problem, Apple warned that iTunes 7.1 may still exhibit difficulties synchronizing Windows contacts with an iPod.
The text and graphics of iTunes running on a Vista machine also may not be correctly displayed, though resizing the iTunes screen should correct the issue.
Apple also reminded users that iTunes remains unsupported on 64-bit editions of either Windows XP or Windows Vista.
Microsoft has said it is working with a long list of partners, including Apple, to make sure its software is compatible with Vista. The new operating system launched Jan. 30.
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 longtime rivals.
They compete in computer systems, which Microsoft dominates, and in the digital music arena, which Apple dominates.