In the posting named "eruby does not output error message" I described 
the problem that I just get an Apache Internal Server Error if there is 
a syntax error in the ruby code.
I tried invoking eruby in the console using the option -Mc for CGI mode. 
This should force eruby to output error messages in HTML. In eruby 0.9.7 
this does not happen. So I tried the same with eruby 0.9.6. And voila. 
eruby gives me the nice error notification I wanted.

Could this be a bug in eruby 0.9.7 or have I just configured anything wrong?

Masanori