Is rehash() funky on windows build?

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I am running 3.6.2 at work on a Windows xp machine from the Visual Basic build
(thanks!!!).

When I create a new m-file, I have to restart Octave to find it, even if I run
rehash().  I just double checked, and I can find other m-files in the same
directory (i.e. addpath() worked fine).

Once Octave knows about an m-file, updates to the m-file show up as expected.

Does anybody know a solution?

I can post more information if helpful.

Tx