Overwriting CSS properties, a line-height issue

I made a layout for www.phpbb.pl and I want to apply the same layout for phpBB3 style.

I did that almost, but there is a difference in the footer. I think it's related with line-height and overwriting CSS properties from phpBB3 style. I tried to开发者_运维问答 reset properties, but it doesn't help.I don't know how to go around it.

For css and html please look at www.phpbb.pl and www.phpbb.pl/forum/ source code.

Images to compare:

#oberon_footer #oberon_left_side {
    float:left;
}

Needs to be

#oberon_footer #oberon_left_side {
    float:left;
    line-height: 18px;
}

Style.php line 3975 (may not be the same in the source file)