The danger is that calling a sub as &subname; (with an ampersand, without parentheses) will pass on the current subroutine's @_ argument array. Which is almost never what you want to do.

Using both parentheses and & sign is the same as just parentheses, and you can usually get away without parentheses too, provided the subroutine is defined before the call.

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re^5: a classic : 'Premature end of script headers' problem by Joost
in thread a classic : 'Premature end of script headers' problem by hmbscully

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