The release notes link on VT is wrong, here's the real one:

http://www.cisco.com/web/software/282364316/25213/vpnclient-darwin-4.9.1.0180-readme.txt

Posted: 06 December 2007
Revision: Release 4.9.01.0180
Files: vpnclient-darwin-4.9.01.0180-universal-k9.dmg


Resolved Issues:
CSCso13689 mac client issues with mac book air dynamic ethernet interfaces
CSCsv47678 "Launch" button in update notification does not work on Mac
CSCsv29102 Files left behind un-deleted after an uninstall
CSCsu99757 unity mac update notification fails to match version properly
CSCsq29795 MAC VPN Client unable to enroll Online Cert with IOS CA
CSCso78480 Multiple Issues in MAC OSX VPN Client
CSCsd62216 Minimize upon connect doesn't work with MAC OS X 4.9 vpn client
CSCej01792 unity mac append split dns list to search list option
CSCsl12584 MacOS X uninstall script indicates wrong version & why folders are left

Unresolved Issues:

None