The search page work is proceeding slowly. I now have a working retrieval system based on responseXML, but there are two problems at the moment:

• Neither Opera nor IE seem to be able to handle importNode followed by appendChild (the proper DOM methods for pulling a node from the responseXML document into the page), so for those browsers I have to use innerHTML. Urg.
• Safari gives me dreaded "DOM exception 7" error, which presumably can't arise from the same problem, since Safari doesn't allow innerHTML in an XML document, so that will take more investigation.

The determination to do this a) correctly where possible, b) at least effectively where it can't be correct, and c) reliably for the future is proving very messy, but this is a really the project where I'm working out all the bugs for this stuff for future projects, and devising a set of solid strategies for XSLT 2, multiple-namespace documents and application/xsl_xhtml, so I think it's worth the pain.