In order to help improve Quicksilver, the Quicksilver Development Team requests that the diagnostic and usage information collected by your Mac be sent for examination. The information is sent only with your consent (click the 'Send Report' button) and is submitted anonymously.
You can view a list of the Crash Logs that currently exist for Quicksilver by opening the Console.app and viewing the Entries beginning with "Quicksilver" in the left sidebar.