Hey I got simmalar issue. Download speeds good, searching for downloads good, but every once in a while it will just drop speed (Ie. 20 downloading @ 0kbs) and it will stay that way untill i restart limewire. I immagine its a glitch in XP pro cause i didnt have that issue in win98se and i just upgraded it doesnt happen all the time mainly when i resize one of the views in limewire lmao could be a beta issue i have 4.12.3