It seems all hell is breaking loose between some of the heavyweights in the technology industry. Firstly, Symantec vs Microsoft.
Symantec are one of the leaders in security products for Windows, with Norton AntiVirus to their name. Their argument against Microsoft is about Symantec's Volume Manager software (acquired from Symantec's purchase of software firm Veritas). Back in 1996, Veritas made an agreement with Microsoft to license this software to help move chunks of data around in Windows.
Symantec claim that Microsoft have violated their intellectual property rights. They probably aren't too happy about Microsoft's new anti-spyware (bundled with Vista) and anti-virus (not bundled) services which will be launched. It's still a bit unclear exactly how Symantec's rights have been violated in this case, but I'm sure we will find out when this case continues.
The second fight is Creative vs Apple. Creative recently sued Apple for violation of its patent to do with music sorting, by including this in the iPod.
Now Apple have struck back claiming that Creative's player violates 4 of Apple's patents.