Microsoft Security Response Center has issued a known issues update regardig MS06-25 release.
It is said that the issue involves dial-up scripting.
from Microsoft site:
An issue has been confirmed involving dial-up connections which use the terminal window or dial-up scripting. Dial-up terminal windows or scripting is an older technology rarely used by most modern dial-up connections. If dial-up scripting is used in a connection, the connection may stop responding. This does not affect any dial-up connections that do not use dial-up scripting. This issue may affect direct dial connections to a corporate or university network or to some ISPs (Internet Service Providers). Microsoft is working on developing and testing a revision to this update which will address this issue. If you need to use these dial-up scripting or terminal window features do not install security update MS06-025 (KB911280) until the revised version is available. More information on dial-up scripting can be found at http://www.microsoft.com/technet/archive/winntas/proddocs/network/xns10.mspx. Virtual private network (VPN) connections are not affected by this issue; dial-up scripting is not supported in VPN scenarios.
More info can be found at the site.