GooSync Error “511″
by Craig Mayhew on Sep.30, 2009, under Guides/Fixes
If you’ve got GooSync on your mobile phone and it suddenly refuses to sync spouting a “511″ error code then simply log into your GooSync account (via a web browser) and reselect your mobile device (click the picture of your device). This worked for me and had been a problem for the last few days.
I imagine they have a database error where they no longer know what device you are using…
