contents overflowing column edge

Look at this picture
http://farm4.static.flickr.com/3352/...bae7c56c_o.png

see how above the red line that column contents stops showing, under the red line it goes beyond the column edge and shows the whole contents... I don't want it to... how can I fix this so the contents are hidden like the cells above the red line

putting a space in the adjacent cell will do it.
to do the lot put a space in a cell copy paste to a cel or range of cells or copy space edit/goto/special/blanks/paste.
this however would affect any formula with isblank/istext as a condition