The magic version of IBConsole is v1.0.0.336. It was the one I was
using up until a few days ago when I switched to v339 and got the
index problem detailed previously. When trying to get back to an
earlier working version, I was horrified to realize that v320 has not
syntax highlighting.

So v336 is definitely the last version that will be of use with
FB1.0 -- may the Fork be with you. You can get v336 from:

http://firebird.sourceforge.net/download/ibconsole.exe

Regards,
Andrew Ferguson
-- If there were no Andrew, it would be necessary to invent one.