Cropping to selection

I am making a bg, and using a drop shadow on the border part. When I go
to crop the image, so I can get a *full* drop shadow line, I end up with
a solid color line (which matches the bg color), when I tile it in my
page. Meaning, when it tiles, you can see a thin line every section of
the heighth of the actual bg.

I try to make my bgs look fairly decent for viewers of 256 colors, and
the line shows up very bad in 256 colors. When I switch to high color,
the line is less noticable, but is still there. I am saving as a jpeg
and I know jpegs look kind of crappy at 256, but I do try hard to make
them look halfway decent. Not all my bgs end up with this thin crop
line. Maybe I am getting this, for I am using a textured (noise) bg?

When I rectangle select, crop to selection, the bg color box is the main
color in my bg itself (not sure if this makes a difference), the
controls are set at feather 0, and antialias not checked.

What can I do to get rid of that thin line when my bg tiles?
Should I make a dup, cut out small section of drop shadow and paste into
the original bg?
What do others do in order for this thin crop line not to show up when
tiling?

TIA,
--
Cindy K. Stanley
Stanley Support Service
<http://pages.prodigy.net/stanleysupport/>

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