If it isn't broken (I can't stand to use improper grammer) don't fix it.

I worked for a University IT shop for a number of years. If we had to upgrade software for security purposes, we did it and lived through any technical consequences, however if an update came out and it was not mission critical, then we wouldn't updgrade. In general, we would not upgrade with every version release, but we would consider upgrading with every other version release if the improvements were signficant. We would also look at upgrading as a way to eliminate mission critical bugs or annoyances. But if the software was working well and without issue, we would avoid upgrading it.

Does that make any sense? I hope so.

It has been said:
Hybrid drivers come in 3 flavors, greenie, techie and cheapie. Pick any 2.
2005 Prius, Melinium Silver over gray, package 5 (AI)