I use FP2002 (Office xp) and it's very well behaved. In fact, one of the settings in configuring FP is to tell it to leave all code alone.
Once you do that, you had better be correct as it won't change even YOUR bad code. I've not had any problem. For most people, FP is a lot easier to use - there is quite a curve with Dreamweaver (good program, I'm not about to bash it - I have it too, but for managing FP webs on servers with FP extensions, FP is totally faster!)
I never wanted to take the time to make Dreamweaver work on my web. It just seemed to be much more complex having to use FTP, where FP will deal directly with our ISPs servers. I simply start FP, login, grab the file to modify, make the change and hit "save" and I'm done. It's a dream with databases, too. I can open my Access database directly on the server and modify it directly in Access and hit save and I'm done.
Anyway, that's a long-winded answer meaning "upgrade to FP2002, you won't be sorry". It won't change code on you. Dreamweaver has a lot of power and great features, however.