Thanks again Jezebel,
The prob is I'm using tables to generate forms and have different columns in
some rows. Whilst entering details in some of the cells the table properties
seem to change to increase the left indent by small amounts on some rows and
this means that some rows end up offset to the others in the table. Also, the
check box "Preferred Width" switches on by itself and the preferred width
value varies from the sum of the columns that I have previously set. The
problem is particularly bad when I have to split the table to adjust columns
in one row and then join it back together again either by deleting the
paragraph marker separating the two parts or by drag & dropping the row onto
the bottom of the rest of the table. It can take hours of repeatedly
resetting before, if I'm lucky, the table properties will stay where they
are put.