Just now I wanted to try the translator plugin in Norbusan's build. To do that I had to add the line
trn,rocks/translate, 55 55 55 55 55 55
to the /.rockbox/viewers.config
After doing that the translator works fine but I noticed that now when RB is started I briefly see "Filetype string buffer empty" on my screen.
When I remove the above mentioned line again from .config the warning (?) has also disappeared. So it has to do with the change in the configuration.
But what does it mean exactly ?