Build 46 can be downloaded from here:
Windows: Rainlendar-2.2.b46.zip
Linux: Rainlendar-2.2.b46.tar.bz2

This is beta version! It has not been tested.

[2.1 Build 46] - 09 Sep 2007
o Local time was intepreted as UTC in the Google plugin. Fixed.
o Added support for templates to event and todo dialogs. Check the manual for details how to use them.
o Dismissing an event hid also the next event from the list. Fixed.
o Added page setup to print dialog.
o Fixed links that were surrounded with parenthesis.
o Added an advanced option to show the name of the calendars in the event and todo lists.
o Support for Mozilla alarms is now optional.
o Creating a new event or task from the tray menu sets the date correctly now.
o Added option to use the default Google alarms. Works only if you don't define any alarm for the event.
o Events added to Google calendar are not deleted from other calendars anymore (you'll get duplicates though).
o Added and option to group the multiday events in the event list.
o Added support for "On Desktop" setting on Linux.
o Fixed a crash bug when multiple network calendars were used at the same time.
o Calendar lists can be now filtered from the window settings by using the "Visible calendars".

Is there a change in the skin?
I usually modify it to add custom categories style in previous versions
But in this version, every time I modify the skin and reload it
It said it cant be loaded

IMHO the best version till now, because it is stable using 5 online calendars :=

Jackal, the skin is the same as in the previous build. Check from the log file what goes wrong when the modified skin is tried to load.

After installing this I noticed that the first event of every day is listed last on the Events window.

i.e.
9:30am-10:20am Class 2
1:00pm-4:20pm Class 3
8:30am-9:20am Class 1

That happened with all my class schedules

or

t1-t2 Event 1
t3-t4 Event 2
All day event

when the all day events are the first on the list in previous builds.

Yes, I noticed that too. I'll fix it in the next build.