Little warning when updating via wordpress from 1.2.1 to 1.2.2:
If you uploaded the directories via FTP and did not change the permissions like the other files (to update it directly via wordpress instead of FTP), the wordpress update script throws an error (because it does not has the rights to remove the uploaded directories) and removes SABRE completely from the plugin list after disabling it.
I had to delete the three directories via FTP and do a fresh sabre installation.
