Here is another small difference in TeX code exporting between LyX
1.1.6fix4 and 1.2.0:
create a math in LyX:
\left< a+b \right>
and then compile it.
Both versions work OK. Then
save the file. Reopen it.
Both versions complain "Deco was not found..."
However, if you compile it, v1.2.0 will report errors.
The exported TeX code looks like
$\left\< a+b\right\> $
Though we can use \langle and \rangle to work around this problem, it
would be more convenient if < and > work.
P.S.: I like the way v1.2.0 exports to TeX code. it is more concise.
