Hello, I found some issues (and fixes) for the current version V3.0.1-alpha (I use the english client tbc 2.5.1)

1. Paladins and Shamans are not in the dropdown list when adding a player (depending on faction)
2. the summary of attendees of an event also shows only 8 classes, depending on faction pala or shaman is missing
3. When adding a new player, the 'Add Player' window is transparent and overlaps with the other interface
4. MOST IMPORTANT BUG: When some players of my guild sign up for an event their class (or race) is lost. It mostly happens to some Priests, Shamans and Warriors (but I guess all are affected). Strangely it happens only sometimes and mostly the same characters. When I manually edit their class later and save, it's ok for some time - but the other day it's lost again (and only sometimes). Quite confusing/frustrating.

The issues 1) and 2) are no big deal, I managed to fix that myself already :)

3. was already bit more headache, because it didn't want to load the Dialog-Box schemes and the Backdrop didn't work. So I moved the whole window to the right, and replaced that with a simple black transparent square - which looks ok for me now :)

4. I don't know how to solve this. I was looking for hours now to find any clue but I really don't know. Someone with real pro skills has to fix this ;) I'm willing to give more info if needed...

Some changes I wrote here
Track Changes Group Calendar.xlsx

Later I found some minor bugs (like spelling etc.), so the whole fix alltogether as a zip:
GroupCalendar-v3.0.1-beta.zip

Hope some author/developer can verify (and improve) this :)

GroupCalendar-v302.zip

I fixed some lines in EventEditor, hope it helps to save the race+classes.

Update: It didn't help with the race/class problem.
I also found this article https://www.wowinterface.com/forums/showthread.php?t=52553