We are using two datasync servers, the newer one is 1.2 build 579 (updated from build 434) and the older one is 1.0 build 290 (updated step by step from initial public release). Is it possible to update the older server straight from 1.0 build 290 to 1.2 build 579?

I'm asking this, because we updated the older server at one point over one patch release and something weird happened during update (no errors though), since the server was not able to sync anything anymore. Luckily, we had taken Vmware snapshot just before updating, so we were able to revert back to previous state. We have too many users with too many issues with datasync using the older server, so it really needs to be patched and now i would like to know that are the datasync patches really cumulative or not.