Left Join Returns Values Where I Was Was Expecting Nulls

I have a query which is returning a different result set when it is run against identical tables in 2 different environments.

The query is like:

Select
F.LicenseeID, IsSpecialLicensee
from FactTable F
left join View_SpecialLicensee SL on F.LicenseeID = SL.LicenseeID


The Create Statement for the view is like

Create View [dbo].[View_SpecialLicensee]
as
Select LicenseeID, LicenseeName, IsSpecialLicensee = 1
from DimensionLicensee
where LicenseeName like '%ibm%'
or LicenseeName like '%cisco%'
or LicenseeName like '%hp%'


In my test environment, I get the query result I expected:
LicenseeID, IsSpecialLicensee
1 , 1 - (where LicenseeName = 'IBM')
2, null - (where LicenseeName = 'Juniper')
3, 1 - (where LicenseeName = 'Cisco')
4, null - (where LicenseeName = 'Microsoft')
5, null - (where LicenseeName = 'Oracle')
6, null - (where LicenseeName = 'Apple')


In my production environment, I get the following query result:
1 , 1 - (where LicenseeName = 'IBM')
2, 1 - (where LicenseeName = 'Juniper')
3, 1 - (where LicenseeName = 'Cisco')
4, 1 - (where LicenseeName = 'Microsoft')
5, 1 - (where LicenseeName = 'Oracle')
6, 1 - (where LicenseeName = 'Apple')


Ideas as to what changed gratefully received.

FYI the production environment which returned the 2nd dataset is SQL2000, I have got the result I expected in both SQL2000 and SQL2005 development environments.