Upgraded tinyMCE to 3.0.1 in hopes of fixing IE race conditions. Fixed a couple minor syntax errors in Javascript objects declared in various places.
.mcePageBreak {display:block;border:0;width:100%;height:12px;border-top:1px dotted #ccc;margin-top:15px;background:#fff url(../img/pagebreak.gif) no-repeat center top;}