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.

.panel_wrapper div.current {
	height: 100px;
}

#width, #height {
	width: 50px;
}

#file {
	width: 250px;
}