Version: (using KDE KDE 3.1.3) Installed from: SuSE RPMs The calendar file was truncated to 8192 bytes (my HD block size I think) when I left KOrg. Not long after that, I found out that my HD was full. So, I deduced (I may be wrong since I was unable to reproduce this bug) that when the HD is full, the calendar is not saved. But I can't be sure (however, I think you can esaily check if the proper error checking is done).
*** This bug has been marked as a duplicate of 52851 ***