Yes, I could!
I sent.

Could you please resend. I haven't seen anything in my inbox.

Thank you.
Disabling the boot options has helped, but the second option does not work.
Let us consider the problem solved!

Not long, I was happy - with a black background squares appeared again! Probably require modification programs, because a simple code change CSS does not help. :(

To solve this just go to plugins/content/jw_sigpro/jw_sigpro/tmpl/Elegant/css/template.css and change this:
ul.sigProElegant li.sigProThumb {
    background: none repeat scroll 0 0 transparent !important;
    border: medium none !important;
    float: left;
    margin: 0 1px 1px 0;
    padding: 0;
 
}
to this:
ul.sigProElegant li.sigProThumb {
    background: none repeat scroll 0 0 transparent !important;
    border: medium none !important;
    float: left;
    margin: 0 1px 1px 0;
    padding: 0;
    list-style: none !important;
}

Thanks, Katia!
Was the last square in the lower left corner.
[img][/img]

This is caused by this styling:

ul li {
    list-style: square outside none;
}
at  typo.css file.

Just add this in your plugins/content/jw_sigpro/jw_sigpro/tmpl/Elegant/css/template.css file in order to override it:

ul.sigProElegant li {
    list-style: none outside none !important;
}

Thank you very much!
Now working on a black background with no gaps!
Best regards.
Valery