I've been using Rainlendar (free version) for a while now, and had never encountered any trouble until today.
I needed to sync Rainlendar with my Google calendar and my new mobile phone (htc wildfire S). So I downloaded GCalDaemon ("OS-independent Java program that offers two-way synchronization between Google Calendar and various iCalendar compatible calendar"), which helped me to sync everything successfully.
What annoys me is that, each time synchronization is occurring automatically, I lose the different colors and pictures previously chosen for my tasks in Rainlendar. Everything becomes blue.
I suppose the problem might be caused by the program I used earlier (GCalDaemon).
So my question is : would I get rid of this problem (for sure) if I pay for Rainlendar pro version ?