Question

#main .inside .ce_text {
    -moz-column-count: 2;
    -moz-column-gap: 31px;
    -webkit-column-count: 2;
    -webkit-column-gap: 31px;
    column-count: 2;
    column-gap: 31px;
}

#main .inside .ce_tabcontrol_pane .ce_text {
    -moz-column-count: 0;
    -webkit-column-count: 0;
    column-count: 0;
}

the second rule should be more important than the first one imo. Although chrome renders 2 columns (!important also doesn’t help).
But: Safari is doing everthing correct. Why?

Chrome 24

Safari 6.0.2

Answer 1

According to MDN 0 is no valid input for column-count.

Is a strictly positive describing the ideal number of columns into which the content of the element will be flowed. If the column-width is also set to a non-auto value, it merely indicates the maximum allowed number of columns.

I think, what you mean is more like this:

#main .inside .ce_tabcontrol_pane .ce_text {
    -moz-column-count: 1;
    -webkit-column-count: 1;
    column-count: 1;
}

Example Fiddle working in Chrome26 as well as Firefox19.