Actually, I don't think I'll need your termcap anymore. Your PS1 would be the most helpful thing you could provide right now.What are you using to colorize your prompt?The issue you're having almost certainly stems from that. If your PS1 contains any escape sequences (which it does, to produce the colors: plenty!), but doesn't protect them with zsh's %{ and %}, then you're going to see problems like you're currently seeing.Did you modify your PS1 by hand, or was there a tool to colorize it?
I did it by hand, which might indeed be the reason why there is something messed up!!