Right now, the Clipboard Module for Quicksilver writes/caches clipboard data to disk in a few ways, e.g. here. Depending on your system, this data could grow to several megabytes and may be backed up unencrypted onto Time Machine or synced online via Dropbox. If you ever copy-and-paste complicate passwords or other sensitive data, you may consider this a significant security risk.
- Set the following directories to read-only:
Directories: