[support] Displaying blocks in a theme

[Roger]

Hope someone can help with this.
Drupal 7 updated.

I've used a few different themes and find that information in blocks has 
a line above the block that I cannot remove.
When module Automatic Nodetitles is on, the content title is not needed 
but the theme still displays an annoying border.

Has anyone found a way around this so that blocks have no extraneous or 
unwanted extra lines displaying.

I have similarly found that tables created in CKeditor seem to have a 
faint top border even when border='0'

This border problem occurs in Bartik, Garland, Mayo, Business, even in 
Stark so I do not believe it is theme related.

In Garland it stems from two points.
<td colspan="200px">
<hr>
</td>
is automatically inserted in the page code
In style.css  I set display:none; but only the blue lines are off, light 
grey lines come from somewhere else, maybe core?

It's probably a cutesy idea for an automatic seperator between articles 
but no use to my themes.

Help is greatly appreciated
Thank you in advance
Roger