Remove the '?' from the '\d*'. It's making it try to match as few digits as possible. /(-?\d*\.?\d+)to(-?\d*\.\d+)/ will work.

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Jeff[japhy]Pinyan: Perl, regex, and perl hacker, who'd like a job (NYC-area)
s++=END;++y(;-P)}y js++=;shajsj<++y(p-q)}?print:??;