The problem with combining \b, \f and \# is that \b (at least) is applied
first, then \# is applied to the result. Typically, most of the text in your
\b switch will be discarded and...well, it just won't be what you want.

To go back to my post of 02 Nov 2006 on this general subject, what to do
depends on exactly what can be in
"Bonus" and how you want it displayed. In this case I think it's fair to
assume that "Bonus" could
have the following types of content:
1. numeric, non-zero, positive, e.g. 1.234
2. numeric, zero, e.g. 0
3. blank (could come from a numeric column where Word or the data source has
not substitued a "0"), i.e. ""
Using \b and \# suggests you want the following:

1. in recognition of your peformance in 2006, you will receive a bonus
payment of £1.23.
2. and 3. <blank>
(If you want to deal with a negative value maybe it shouldn't be named
"Bonus" :-) )
If so, I suggest you try the following fields:
( SET mybonus { MERGEFIELD Bonus \#"£,0.00;;" }
}{ IF "{ REF mybonus }" = ""
""
"in recognition of your peformance in 2006, you will receive a bonus payment
of { REF mybonus }." }

(all the {} need to be the special "field code braces" you can insert using
ctrl-F9).

Ideally you would be able to do this much more simply using

{ MERGEFIELD Bonus \#"'in recognition of your peformance in 2006, you will
receive a bonus payment of '£,0.00;;" }

or by applying the \b and \f switches to the { REF bonus } field, but those
switches are only available in the MERGEFIELD field.

Peter Jamieson