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.
ins {
border-bottom: 1px solid green;
text-decoration: none;
color: green;
}
del {
color: Red;
text-decoration: line-through;
}
cite {
border-bottom: 1px dashed blue;
}
acronym {
border-bottom: 1px dotted #CCC;
cursor: help;
}
abbr, html\:abbr {
border-bottom: 1px dashed #CCC;
cursor: help;
}