Existing users, 
I installed Onyx for Leopard, and with the first use it destroyed everything in my iCal, including all my iCal backups in Time Capsule.
Apple was unable to retrieve my information.
Watch out!!
JCL
OnyX
Maintenance, optimization and system personalization tool.
Version: 2.1.1
Damages iCal
Feedback Type: Commentary
Contributed by: jcl2paris Tuesday, April 29 2008 @ 09:26 PM PDT
Product Platform: MacOSX
Used Product For: Less than a month
Recommend Product: NO
Comments
Damages iCal - bobbybray_dotmac
I think the same thing happened to me. I couldn't sync any ical, address book or bookmarks with my iphone. It blew all the files in library etc and I had to erase them and reinstall again. Be careful until this has a bug fix!!Sunday, May 11 2008 @ 10:38 AM PDT
Damages iCal - willowdemayo
I had a similar experience. Running automation in Onyx 1.9.5 on a PowerBook G4 with OS 10.5.2. The automation hung at "Deleting Hidden DS.store files". I had to Force Quit Onyx and restart then spend all day running a repair in Disk Utility on my Time Machine Backups disk image (using an Airport Disk for backups). Both the Disk Utility and Time Machine crashed on the file at least once before it was finally successfully repaired and restored. This is the second time I've tried using automation with Leopard (first time was w/Onyx 1.9.4) and both time it has hung and caused time-consuming problems.I used Onyx previously on Tiger with great success and would love to have that functionality back but I'm concerned that there are still significant bugs in the Leopard version.
Tuesday, May 27 2008 @ 10:58 AM PDT
Damages iCal - rodneyweston
Can you please tell us what you did to cause Onyx to delete your iCal? That is: which Onyx function appears to have caused the problem?Thanks!
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Sunday, May 04 2008 @ 04:43 AM PDT