Sometimes I have some COM related error that requires me to kill all instances of explorer and restart the last one. When I do this eBoostr's Control Panel icon disappears from system tray even though the process continues to run. It comes back when I restart it. Not a big deal, but thought I'd mention it.
Setup: HP Laptop with 1.8GHz CPU and 4GB RAM. 32-bit Windows XP Pro with SP3. eBoostr set to use 1 GB of RAM that 32-bit Windows cannot manage.