Why is promiscuous mode not working?
All versions between 0.4b3 and 0.5a2 had a bug (well, an omission, really) that prevented them from setting promiscuous mode properly. This has been fixed in the latest version. If you are still having issues, please verify that the packets are visible (using tcpdump or MacSniffer) and let me know, I’ll get right on it. (See the documentation on external captures for more information.