When you'll run perldoc perlfaq1 you'll get an explanation "When I shouldn't program in Perl" and when to "do task in perl". Those are direct answers to your question.

Furthermore, in 95% cases Perl has possibility to interconnect with your favourite language X (including Java. C/C++ also guaranteed as Perl is written in C).

Personally, I use Perl in my everyday programming -- it's great to have a possibility to perform complicated transformations in just a seconds after I needed them.

Courage, the Cowardly Dog