Intel is reportedly investigating a compatibility issue involving the iPhone and certain chipsets, according to CNET News. A number of users have reported that iTunes 9 for Windows is able to recognize the iPhone, however the device cannot sync with certain machines utilizing Intel's P55 chipset and motherboards from certain manufacturers.

"Our leading theory is a BIOS or system configuration issue, but we are still investigating," Intel said.

The company's P55 Express chipset works with processors in the Core i7-800 and Core i5-700 families. Most problems have also involved 64-bit Windows 7, although the incompatibility has not been confirmed to involve the particular operating system.

"If we determine this to be a problem specific to Windows 7, we will post an update on the Microsoft Answers site," Microsoft told The Register.

A forum poster on Apple's support forums, Voodo_Mojo, allegedly reestablished sync after downgrading to iTunes 9.0.0 and using only local drives for a database, although syncing photos still caused difficulties. Slipgrid proposed a different fix that required disabling the auto turn-off setting for USB power, which can be found in the Control Panel energy settings.

Apple, Microsoft and Intel have yet to announce a single solution to the problems.