Spoilsport ;-)

Actually, the obfuscation here is not very complicated. I don't even know whether this thing qualifies as an obfu. I mean, it's hard to read, but there is just enough mangling to hide 5 or 6 keywords to protect the guilty of abusing a little known Perl feature to make it do the job... then again, that looks like a pretty generic description of quite a number of obfus ;-)

The thing I like about this particular piece of code is that I learned one more obscure Perl detail that makes me really, really afraid I might at some time be forced to actually use it.