I've checked the "Create ClearCase report" in the post-build actions because I want to keep track of the config spec used by my snapshot view, base UCM project. This should work, because the help says:

Create a report that will show ClearCase related information:

• For builds running with base ClearCase configuration: the CSPEC that was used.
• For builds running with UCM ClearCase: the stream and baselines that were used (baselines will be shown only if CodeFreeze option was selected in the UCM ClearCase configuration).

However, when the job completes, I see this in the ClearCase Information link for the job:

ClearCase Information
Stream:
Baseline list:
Component Baseline

After looking at the code, it looks like this won't work correctly for Base snapshot views; it does work for dynamic views. I only see the setting of the config spec for the post-build action in DynamicCheckoutAction, but not in SnapshotCheckoutAction.