...Neal, ....i'm thinkin - maybe -just maybe, when i set up his panel bar size - on the
panel preferences (initially, before update)...under
appearance - the "backround.png" (usr/share/lxpanel/images) got moved or changed by quirk or accident....
I checked a live cd today....to try to emulate - but could not.....BUT i'm not speaking of any "LINE" - just a color scheme/backround snafu...BECAUSE of my bad eyes, i WILL INCREASE the magnification to verify what you are saying....maybe the
separation is such?
-when you uncheck {in live cd}: "IMAGE" box, it goes to "NONE"....and i have his set to "
SOLID color with opacity" for now....it {image box} reverts back to "NONE" if rechecked...and maybe this is what happened, and it showed up after the update {as a coincidence}....
The IMAGE box should be "
backround.png" - not "none"...{although there is nothing wrong with the backround default "lightweight" image....just the lower panel settings bar....} maybe you understand this and we are talking about the same type scenario....?
I cannot verify till i see his machine again, and it will be in a day or two....I hope it is that simple, and not a pclos lxde error....i have installed 2011.06 on 4 other machines thusfar... pretty much the same way, with the same DISK....no prob-le-mos...(just with the unichrome onboard video, and a few older Nvidia RIVA TNT chipsets..............have good luck with the ATI rage 128 series of AGP cards with larger lcd monitors, for seniors basic usage...)
I will attempt the prescribed - and report back....thanks for spelling things out for me....

JN.