The internal representation of percent is a combination of an enum and a float value. We can do better by just using fixed-point numbers. Then, we can also export the fixed-point value easily using the existing integer API provisions in lvm2app.
There's a patch in review now, http://www.redhat.com/archives/lvm-devel/2010-December/msg00040.html
I have checked the proposed patch in.
Marking this verified (SanityOnly).
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
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if the solution does not work for you.