So the problem is something about getting to post at all, not the design?
I've noticed something mildly glitchy-- a grey warning screen comes up sometimes when I refresh the screen, but if I hit "cancel" and refresh again, it's fine. It's trivial on high bandwidth, but would be a pain on low bandwidth.
Can you detail exactly what goes wrong when it's hard for you to post?
Well, it just doesn't post. I'm not really sure what goes wrong ... sorry.
Some research says that lurkers make up over 90% of online groups. I suspect that Less Wrong has an even higher percentage of lurkers than other online communities.
Please post a comment in this thread saying "Hi." You can say more if you want, but just posting "Hi" is good for a guaranteed free point of karma.
Also see the introduction thread.