[mrmikel]

Any errors at all are almost as bad as lots of them because they can be easy to overlook when there aren't so many of them.

One very common error is the chunck of the paragraph at the top of the second column being jammed into the first column often following the first paragraph. Sometimes the following paragraph of the second column follows. Sometimes not.

Not so easy to see because it just seems to follow too.

Also headings which migrate to the first column make life interesting.

The PDF cares not for logic only for display.