Comment # 2 on bug 945999 from Dieter Jurzitza

I found a solution (after quite a while of searching ...): it was neccessary to
run 

a2enmod version

After that, apache was running again. However, this is not self-explanatory.
Maybe this is similar to what you are suggesting. Wouldn't it make sense to put
the corresponding call into the "post" section of phpMyAdmin?

The issue happened after a "plain" installation of apache & adding phpMyAdmin.

Thank you for looking into that,
take care




Dieter Jurzitza