I am using bissubscribe.exe to subscribe to events published by our Team Foundation Server (2010).
When receiving the SOAP message from TFS for the CheckinEvent event type, it only includes the first 25 versioned item changes even though I know there were more files changed.
I can't find this restriction documented anywhere on MSDN (in fact the TFS eventing service documentation seems to be largely limited to this post from 2008).