searching for "4.1" works, but "4.1.1" returns no results

For my companies site I have removed all numbers from the "noise.enu"
file so that we can search through our documents for version numbers
of
our software.

The problem is that I can search for the major and first minor version
numbers, such as 3.3 or 4.1, but if I try to search for second minor
numbers as well, the search returns no results, i.e. 4.1.1 or 3.2.3. I
know documents exist on our site with 4.1.0 and 4.1.1 in them, but
they
won't appear in the results.

I'm wondering if there is a 2 period/fullstop limit or some other
combination of rules that "4.1.1" breaks? Any ideas?

(btw, this is a repeat post, as the only reply I get last time (Nov
2005) was basically an advertisement for 'Coveo' and I'm really
looking for a solution or work around for Index Server at this stage
(though I have tasked one of my team to look at Coveo))

.

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