[omega] Slides using omega

[Eftaxiopoulos Dimitrios]

I want to make presentations in greek using omega. A year and a half ago I had 
managed to do that by using the seminar class and by modifying a sample 
seminar presentation (sem-dem0.tex) available from CTAN. Now, that I have 
moved from Suse 9.0 to Debian 3.1 Linux and several files related to pstricks 
have been updated, this sample file doesn't compile. I get an error
----------------------------------------------------------------------------------------------------------
) (/usr/share/texmf/tex/latex/hyperref/hyperref.sty
(/usr/share/texmf/tex/latex/hyperref/pd1enc.def)
(/usr/share/texmf/tex/latex/config/hyperref.cfg)
Implicit mode ON; LaTeX internals redefined
Runaway definition?
->
! Omega capacity exceeded, sorry [main memory size=2000001].
\g at addto@macro ...fter {#1#2}\xdef #1{\the \toks@ 
                                                  }\endgroup 
l.2557 }
        
No pages of output.
Transcript written on sem-dem0.log.
-----------------------------------------------------------------------------------------------------------
Should I try to increase the memory of omega or the problem is elsewhere? With 
latex the file compiles ok.