Finished theme manager to the point where it's in a working state in Firefox and hopefully IE.
#src_list, #over_list, #out_list {width:280px;}
.mceActionPanel {margin-top:7px;}
.alignPreview {border:1px solid #000; width:140px; height:140px; overflow:hidden; padding:5px;}
.checkbox {border:0;}
.panel_wrapper div.current {height:305px;}
#prev {margin:0; border:1px solid #000; width:99%; height:150px; overflow:auto;}
#align, #classlist {width:150px;}
#width, #height {vertical-align:middle; width:50px; text-align:center;}
#vspace, #hspace, #border {vertical-align:middle; width:30px; text-align:center;}
#class_list {width:180px;}
input {width: 280px;}
#constrain, #onmousemovecheck {width:auto;}
#id, #dir, #lang, #usemap, #longdesc {width:200px;}