I found this behavior in TortoiseSVN 1.12.0 which seems to me like an error:
- after clicking on "Show log" I click on "Show Range..."
- in "Revision Range" dialog I fill value 135000 to Start revision and value 140000 to End revision (radio button is Revision on both)
- I click OK and the revisions are filtered correctly
- I click on "Show Range..." again and now I see value 140000 in Start revision and value 135000 in End revision - they are switched - looks like an error
Jiri