Hi Josh,
Figured I'd check in and give you an update on this issue. gContactSync continues to work without a flaw on my netbook. Its still losing the token on my desktop.
Since I was having other unrelated issues with that PC. I reformatted, re-installed Windows XP Pro, re-installed currentversion of Thunderbird (2.0.0.23 (20090812)) and 0.2.10 version of gContactSync. I made sure to upgrade Windows to all the latest patches, SP3, latest version of .NET, etc., I did not install any other Addons to Thunderbird, just gContactSync and the problem still continues. Syncs good a few times then other times, even in the middle of the Sync, it says the token has expired.
I know I'm one of a very small group having this issue, it actually doesn't bother me that much since it does eventually sync, just wanted to let you know its still occurring.
I wonder if having two PC's sync to the one Google account may have something to do with it? Also, I use GoogleSync on my Blackberry on that account as well.
Anyway, wouldn't trade this for any other sync Addon that's out there right now, this is the best. Keep up the great work.