After updating Java on Snow Leopard (OS X 10.6) I hit a crazy issue with my Flash Builder install, where the editors no longer recognized the dot character as a word separator. This was driving me totally crazy since I’m always using the arrow keys to move around and edit text.

After giving up completely and being resigned to abandon FB and jump ship to FDT over this issue, I found a solution completely by accident while doing something unrelated:

Go to System Preferences > Language & Text > Text, and set the ‘Word Break’ dropdown to ‘English, United States (Computer)’. I needed to log out and log back in again, and everything was back to normal.