I have a similar issue with spray tracer basic. I am running SM 1.4.7 and MM 1.9.2.
L 07/03/2013 - 00:41:21: [SM] Native "AddTempEntHook" reported: TempEntity System unsupported or not available, file a bug report
L 07/03/2013 - 00:41:21: [SM] Displaying call stack trace for plugin "spraytracebasic.smx":
L 07/03/2013 - 00:41:21: [SM] [0] Line 114, /home/groups/sourcemod/upload_tmp/phprNhD7t.sp::OnPluginStart()