w2k SP2.
chcp returns 866
Accsess-2000
A table stores numbers in currency format
When outputting thsese numbers into an HTML page using ASP and Personal Web
Server and viewing it in IE6 all the numbers greater than 999 (i.e. those
where digit group separator might be applied), have letter "B" inserted
together with a space as a group separator.  For instance, 3000.00  is shown
as 3B 000.00
In regional settings the digit group separater set to nothing (empty field)
In Accsess all the numbers look normal.

I managed to sort this out by explicitly disabling digit grouping using
built-in ASP function FormatNumber().
Yet I still am curious where this "B" cames from.
On another computer it works fine without FormatNumber(). Therefore the
problem seems to be somewhere in w2k settings.