I am using Crucible 3 with Perforce. After I created a new repository in Crucible, and while it was still doing the initial indexing, I updated the repository to set a "Start Revision" on the "SCM Details". (The "InitialImport" checkbox has always been unchecked.) Then I clicked Stop on the Summary and Start. Yet, it is still indexing from apparently the first revision. (In any case, it started with revisions long before the Start Revision, from 1998 in fact. I can't say with 100% certainty that it's starting from the very first changelist.)
I would expect it to start indexing on the changelist specified in the Start Revision. Am I misunderstanding what the Start Revision is for?