I'm using 4, host using 3!!!

[Matthew Stuart]

I am using version 4 of MySQL and the people who I am told to use to 
host the site are running 3 on the server I will be using.

I am not using any real complex table structures eg: autoincrement, 
date, timestamp, medium int, small int, indexes. I have to do a dump of 
data to install on remote server.

Will this be backwards compatible? Should I just install version 3 and 
be done with it?

Mat