Does the creator of Stout read this forum? This issue is also happening on our site. All of our October events are showing, but in IE9, only the first November event shows up and then nothing. Switch to compatibility mode and it works fine. Works fine in EVERY other browser. This isn't a Google Calendar issue, it's a Stout GC plugin issue (as this doesn't happen if I embed the calendar directly, outside of the plugin.).
For now I need to disable the plugin and go with an ugly Google calendar... but would very much like to see this issue resolved.