Have you looked at the SQL for the select query?
It may have something like LEFT to get only the x number of left characters... Check to see if, when you change the text, the number of characters returned by the query is the same (characters inclusing spaces)
This is the first set of text and it cuts off just about here and doesn't show the rest
My name is Aubs and I live in the UK. I like crisps. I also like chips
In the examples above, the same number of characters are being returned...
Also, if you don't use the query, and reference the table column, does it still break off the end of the memo field?
Aubs