Firefox Search Plugin

Within the last few days the Firefox search plugin I've used for years for searching titles/ISBNs on LT has started throwing up an error. Technically, it's LT that's giving me the error when I use the search:

Warning: Invalid argument supplied for foreach() in /var/www/html/search_works.php on line 132 Warning: Invalid argument supplied for foreach() in /var/www/html/search_works.php on line 229

Is there anyone who can write up a working search plugin or point me in the direction of where I can download a new one?

(for completeness, I'm using FF 3.6 on Win7)

I'll take a crack at it, if you'll point me to which ones you are using. I use these:

http://mycroft.mozdev.org/search-engines.html?name=LibraryThing
(the works one and the authors one).

and they seem to be working fine for me.

Oh man, that works one is one I made eons ago and totally forgot about. And it works, so thanks!

LOL

Well, thanks to you, too!

Now I'm wondering how I ended up with that other plugin and not the one I made!

Testing it to see if it was better than yours?

Here is a link to a more recent plug-in, which uses the new search:
http://www.librarything.com/topic/104210

(I post it here for cross-referencing purposes, because this thread came up while I was trying to search talk for that other thread, and because others who come across this thread might also find it useful.)