I have 6 tasks right now

Do you get the error always or just sometimes? Does the RTM's webpage work without problems?

rtm's webpage works fine for me and it always either gives that error at which point it just continues on, or sometimes it will crash and disappear. If you want, I can try and see if I can catch it crashing again to see what it says, but I have run other programs that access rtm just fine.(ex. I'm running KDE4 and I've used a plasmoid/applet that can access rtm fine)

Hi,
Rainlendar 2.5 b77 also gives me the "Server returned result: (18) 200 Partial file." error. I'm running Windows 7 RC. No matter what I can't synchro with RTM :-/

OK, now I have tested it with Window XP SP3 and I am still getting the error. So I guess it is not about the OS. Everytime I try to refresh, the green progress icon above the Rainlendar tray icon is shown, but after a few minutes I will get the error...

The server returns 200 meaning that everything went fine so I'm not really sure what data the network library is still waiting for. Can you run Rainlendar in the debug mode (use --debug command line argument or start it from "Debug Rainlendar" link in the program folder)? It should then create a file called RTMDump.xml to the backup folder which contains the data it got from the server. If you open the file with a text editor does it contain all your tasks (if you are not familiar with the xml format I can also check it if you send it to me (rainy@iki.fi))?