I am guessing that the data you were running this against comes from another source, like the Web or was imported or exported to Excel from another data source?
The reason I say that is because Fluff's code replaces a special space, that is often found in those kind of files. The other suggestions we made only work on normal, regular spaces.
For future reference, mentioning those kind of details (where the data is initially coming from) may help you to get an answer sooner, as we then have a better idea of what we are dealing with.