Well I'm an idiot - the fulltext index on page_text was missing from a default installation. It didn't break searches but probably slowed them down tremendously. Also set engine to MyISAM on page_text to avoid cryptic error messages from MySQL.
var TinyMCE_ZoomPlugin={getInfo:function(){return{longname:'Zoom',author:'Moxiecode Systems AB',authorurl:'http://tinymce.moxiecode.com',infourl:'http://wiki.moxiecode.com/index.php/TinyMCE:Plugins/zoom',version:tinyMCE.majorVersion+"."+tinyMCE.minorVersion}},getControlHTML:function(control_name){if(!tinyMCE.isMSIE||tinyMCE.isMSIE5_0||tinyMCE.isOpera)return"";switch(control_name){case"zoom":return'<select id="{$editor_id}_zoomSelect" name="{$editor_id}_zoomSelect" onfocus="tinyMCE.addSelectAccessibility(event, this, window);" onchange="tinyMCE.execInstanceCommand(\'{$editor_id}\',\'mceZoom\',false,this.options[this.selectedIndex].value);" class="mceSelectList">'+'<option value="100%">+ 100%</option>'+'<option value="150%">+ 150%</option>'+'<option value="200%">+ 200%</option>'+'<option value="250%">+ 250%</option>'+'</select>'}return""},execCommand:function(editor_id,element,command,user_interface,value){switch(command){case"mceZoom":tinyMCE.getInstanceById(editor_id).contentDocument.body.style.zoom=value;tinyMCE.getInstanceById(editor_id).contentDocument.body.style.mozZoom=value;return true}return false}};tinyMCE.addPlugin("zoom",TinyMCE_ZoomPlugin);