Found and fixed the bug in the code which checks to see whether a search has looped right around, so now searching stops after traversing the whole document. Then I looked at the search code itself, and found the bug which prevented searches from working. Now searching works, and repeated searches take you through the whole document. These are the remaining bugs with Find:

• Anything that finds a hit in a Category ID causes an endless loop. This is probably just a typo that keeps sending the thing back to the same container.
• Although hits in annotation titles, annotation text, and category explanations are all correctly highlighted, when a hit is found in the teiHeader, the selection is off by one (shifted forward one character). This might be caused by trimming taking place in some place but not in another.
• There's no default action that happens when you press Return in the find/replace dialog box. It should probably be Find, which is non-destructive.

These don't look like showstoppers.