Build 33 can be downloaded from here:
Windows: Rainlendar-2.1.b33.zip
Linux: Rainlendar-2.1.b33.tar.bz2

This is beta version! It has not been tested.

[2.1 Build 33] - 10 Feb 2007
o Updated all 3rd party libraries.
o The image resize uses filtering so the scaled windows look better.
o Ordinals (1st, 2nd, ...) can be localized now too.
o Variables can be used in alarm and tooltip window.
o Implemented category and calendar filters for the windows (in advanced skin settings).
o The strings were not shown for events that came from Outlook 2000. Fixed.
o Wordwrap ate one character if the line was wrapped in middle of a word. Fixed.
o It's now possible to use some wiki-style formatting in the texts. See the help for details.
o Copy transparency doesn't update the background unless it's really necessary.
o The todo list has now secondary sorting order.
o Completed property is stored as date-time instead of just a date as defined in RFC2445.
o It is possible to use custom sorting order with the todo list. You can then just drag the items to whatever order you like.
o Added "Show in calendar" check box to the todo dialog which will show the task in the calendar.
o Changed the ftp upload so that the old file is deleted before the uploaded is renamed.
o Vertical and horizontal calendar layoyut showed incorrect weekdays. Fixed.
o Fixed an offset problem with tooltips and double clicks in vertical and horizontal calendars.
o Setting an offset to the weeknumbers caused some of the numbers not drawn. Fixed.
o Weekly recurring events were set on incorrect day on some timezones. Fixed.
o BYMONTHDAY and BYMONTH are added to iCalendar files for yearly recurring events.
o Fixed a bug in the Outlook plugin which caused a crash if the MAPI login failed.
o Multiple exceptions in an Outlook appointment were not handled correctly. Fixed.
o Added a check to the network calendar so that it won't try to upload the calendar if the download failed.
o Implemented a new error message dialog which can combine error messages.
o New command line arguments: "-I" will import a ics-file and "-e" will execute a function in a script.
o Manager didn't show alarms for the todo items. Fixed.
o The X-Properties Rainlendar writes follow the RFC 2445 more closely now.

What does this error mean?

I think it means you have two net based calendars that your copy of Rainlendar is trying to connect to and can't.

Why it can't is the question. Maybe you added the url's in wrong (has it worked before?), maybe you had a temporary glitch in your connection to the net etc.

It doesn't look like the issue with reoccurring events appearing on the wrong day with the outlook plugin has been fixed.

What's the status of that fix?
-Kevin

AncientPC: Can you check from the log file what the full error code is?

Kevin8020: What issue do you mean? Can you give some more details about this?

Actually I just noticed this, Rainlendar on Outlook reoccurring tasks the date is incorrect. In my case the day should be Monday but Rainlendar is showing the event as Tuesday..

What info do you need Rainy to reproduce this?