have you tried rebooting? If you startup LS after killing explorer you will get issues like this. Also...some themes hides certain systray icons to make room. Also..Also...make sure you don't have any of those wonderful Stardock desktop apps installed, or the remnants of. Also..Also..Also...make sure you have a theme that isn't using really really old systray modules. Also..Also..Also..Also...make sure you aren't using a really old LS build.

I think that covers everything.