the dates variables don't work on RTL templates :|
Don't see any reason why they shouldn't work.. RTL makes no difference for timestamps. They work fine for me in both ltr and rtl message log format.
Well, this is what I used for Group In (Start):
%I%S %N, %E%! : %l %fd%/%/[%h:%m:%s%/%/] %| %M
It works great on LTR, but in RTL it doesn't show the %E variable..
btw (and I don't belive it matters), I'm using TabSrmm 0.9.9.97