Build 40 can be downloaded from here:
This is beta version! It has not been tested.
[2.1 Build 40] - 20 May 2007
o Fixed a crash bug in Linux when new calendars are added with the wizard.
o Reverted the config folder back to the way it was before since the new system created problems in Vista.
o The name of the calendar is written as "X-WR-CALNAME" to the ics file.
o Removed blank lines from the ics file for better iPod compatibility.
o Fixed a crash bug on Linux network calendar when the offline file didn't exist.
o It is now possible to delete just a single instance of a recurring task.
o The ics files will always use CRLF as end of line mark.