Thanks André
> If this may reassure you, I have been using quite a bit of mod_perl 2
> in the last 2-3 years with Apache 2.0.x and lately 2.2.x, under
> Solaris, HPUX, Linux and Windows, and have not had the kind of
> problems you mention. So yes, it looks like you may have some
> mismatched stuff there.
Hmm, I've always used two apaches with mod_proxy. The main errors I got
reported by the front-end apache were "proxy: error reading status line
from remote server". But these errors are not consistent, I got them
from time to time. I'm using libapreq2.08, mod_perl2.0.3 with httpd
2.0.63. (perl5.8.3).
> As for versions, I would tend to recommend the latest version of
> Apache 2.2.x you can find, and then look for the latest versions of
> perl 5.8.x and mod_perl 2.x that fit together.
I've just got another VPS server with perl5.8.8 on it. I'll install
httpd 2.2.9 and mod_perl 2.0.4 and test a little.
Should I get libapreq from svn or the latest stable version 2.08 is ok?

and one more question: I have read that on linux platforms it's better
to use prefork instead of mpm-worker, I remember that we did some
performance test ourselves and it sounds to be true.

Regards.