I am running two Macs here, one on OSX 10.6.8 (Snow Leopard) and the other on OSX 10.7.4 (Lion). i am using DropBox to sync my iCal and Address Book entries and it all works fine until I switch on iSync to sync up my iPhone or iPad. Soon as I turn it on I find that many of my deleted iCal entries return and some just disappear. This also gets uploaded to the iPhone and iPad and is consequently causing me no end of headaches.
Is this a known problem with iSync / DropBox or is it just me?