Our databases total 4.3GB (data) and 1.9GB (index) on 4.0.13

I have set-up a new server with 5.0.24 and loaded the exact same data. The datasize is the same (4.3GB) but the indexes total 2.6GB, that's 700MB more than on 4.0. All the tables and indexes are identical, can anyone shed any light on this?

There is plenty of RAM, I am more concerned with speed.

I have speculated it maybe to do with chts, but if I change the cht the index size stays the same. I am using latin1_general_ci.

Any thoughts appreciated.

Brian Wakem
Email: [url]http://homepage.ntlworld.com/b.wakem/myemail.png[/url]