Conflict between Mac OS X 10.2 and Synergy 1.7
A conflict has been discovered between Mac OS X 10.2, Synergy, and Growl which prevents version 1.7 from running on those systems (regardless of whether Growl is installed). A solution is currently under investigation and a fix (1.7.1) will be released on Monday at the latest. See this report for more information. Sorry about the inconvenience.