I was double clicking to enter values in the cells of my BOM table and then by accident i have clicked something that stop me from being able to do this now.
It was somthing to do with linking the values in the cells together.
I can right click on a cell and select "Edit multiple property values" and that allows me to enter about 20 letters in a cell, but that isn't enough for the descriptions i want to enter.
If some one could help me to revert the settings of my BOM tables back to default, that would be grand.
Have tried re-starting Solidworks (2013) and re-starting the computer, but the changes havn't reverted back.
Also tried going into tools>options>document properties>tables>BOM and fiddling with stuff there, but no success.