First off, I just want to mention that my comp is a piece of crap, and because it is, I never complained about having trouble with it freezing, every single time I clicked on a link, just in the past week or two.
But I noticed when I went to other sites it was not as bad. Now, that you've got a new server, it's not freezing at all, and I'm grateful for that, so please don't go back unless all else fails!
The only problem I'm having, is I'm not getting notified via email when someone posts a response on my ads.
And while I'm on the soapbox, I think you waste a lot of space, leaving ads on the site, without any expiration, and that's gotta cost something. I've spent time going back deleting some of mine to be considerate, until I noticed it wasn't actually deleting entirely.
You might want to consider finding a way to either have the ads expire after so long, or give people instruction on deleting them after a certain amount of time. Not sure if that helps!
Thanks!