WSUS clients not reporting status 0x80190194

Had a bear of a time with WSUS.  I noticed that my machines were no longer reporting back to the server with any kind of status.  I uninstalled, reinstalled to no avail.  My windows update log was giving me a http://server/selfupdate/wuident.cab: error 0x80190194 which lead me to The WSUS Support Team Blog.  Their article here summed up the problem nicely, but I still don't know what happened to break it in the first place.
-PC