Thanks for the response, Bruce. I'm not quite sure what you mean by supporting mulitple versions. I'm not suggesting that you provide any more support for the older versions than is already provided. Just make the incremental updates available so each update can be made in the correct order. Possibly I'm going about updating incorrectly.
I have been trying to keep up to date with the latest versions. Although I must say that I am probably losing some of my potential users as the direction of many of the forum enhancements is om tje area of increased user activity tracking. Many users like to remain as anonymous as possible while on the Internet, so some of these kinds of changes keep them from registering.
It's a fine balance between what the webmaster wants and what the users like. Maybe a bit more control in turning some of these tracking features on/off in the admin section can help customize the forum for different needs.
Anyway, overall it's a great product and I'm very happy with it!