Graphics, Figures & Tables ⇒ Float Error

[sparty]

Hi,

My TexShop in Mac OS Leopard (10.5.8) generate errors only in the floats of table and figures.
The LaTex errors say;
Either
Extra }, or forgotten \endgroup.
or
LaTeX Error: \begin{minipage} on input line 1151 ended by \end{spacing}.

These errors didn't occur until I update my lyx from 1.6.7 to 1.6.8.
Now without using Lyx, my TexShop didn't produce PDF b/c of these errrors.

Any help and ideas will be really appreciated!
Thanks.
-Sparty