Existing users, 
Cisco VPN Client
IPsec VPN client (login required).
Version: 4.9.01.0180
DO NOT USE on Mac Pro
Feedback Type: Troubleshooting Report
Contributed by: aibayroff2 Saturday, September 23 2006 @ 12:50 PM PDT
Product Platform: MacOSX
Used Product For: Less than a month
The kernel panics caused by this bucket of bits are not "occasional" at all. They are unavoidable. You WILL panic your Mac Pro if you ever try to Shutdown after installing this. Furthermore, any attempt to boot while both the Cisco VPN kexts and Parallels Desktop kexts are installed will put you in a panic/restart loop that can only be solved by safe booting and removing the Cisco kexts. DO NOT WASTE YOUR TIME.
System Info:Mac Pro base hardware config with 10.4.7, EFI firmware update, fan firmware update.
Comments
DO NOT USE on Mac Pro - Alexiskai
Works just fine on my Mac Pro with Parallels and VPN 4.9. I am using 10.4.8, however.Tuesday, October 24 2006 @ 07:24 PM PDT
DO NOT USE on Mac Pro - feralchimip
the 10.4.8 update reportedly fixed these kernel panics.Reply to This
Thursday, October 05 2006 @ 03:07 PM PDT