Proteron has announced the release of LiteSwitch X 2.1, an update to its popular application switcher for Mac OS X. Version 2.1 addresses several compatibility issues with Mac OS X 10.3 Panther. LiteSwitch X is priced at US$14.95 and requires Mac OS X 10.1 or later. Proteron today also posted a public memo to Apple Computer regarding the company’s “assimilation of third party software into the Mac OS.” Updated: Fuel Five Media’s Scott Brown has posted an editorial response to Proteron’s memo to Apple.