While using OpenCMIS workbench:
(Version: 0.4.0-SNAPSHOT / Build: 20110426-2129)
Using the workbench to perform a 'cancel checkout' will delete the entire version series in the following scenario (and perhaps others)
(all steps performed with the workbench version above)
(all steps include a refresh step in between to verify that object is current)
-Create a doc. (as major) (refer to this as V1)
-Checkout the doc.
-Checkin the doc. (refer to this as V1)
(you can now verify that there are two versions)
-Checkout the doc. (refer to the working copy as 'pwc')
-Cancel checkout on the doc.
Performing a trace on this step shows that the workbench requests a delete on the id for doc V2 instead of the id for the PWC. This correctly results in deleting the entire version series since there were no additional/optional parameters specified, resulting in data loss that user would not expect.
In our CMIS implementation (where this occurs) our PWC objects have a separate/unique id than the version that preceded them. Not sure if this is related but it is certainly spec compliant.
If you would like to get access to the IBM server used in this scenario please let me know. It is the same one that we have used in the past for interop work.