centering broken for minipages

[larry]

I have two minipages alongside each other that I'd like positioned:

|--hfill--| minipage 1 - minpage 2 |--hfill--|

They're alongside each other fine, but not centered, whatever LyX command I
use.  Layout paragraph center doesn't work, hfills don't work.

Alas, you must fall back to ERT: \begin{centering} before,
\end{centering} after.
-- 
-lsm