I voted for "reformat and reinstall".

I was having trouble after trouble with my perl installation on cygwin at my new job. CPAN was broken - refused to run make. I'd use it to get get modules, then cd ~/.cpan/build/module-dir; make && make test.... Had to work out the dependencies myself. Then cygwin/X stopped working. "Screw this, I'll just blow away C:\cygwin and start from scratch".

Half a day later, and I think I have most of the modules I had worked so hard to get installed the first time re-installed. CPAN is still a little funky (serves me right for keeping a "hand-me-down" computer instead of insisting on a freshly imaged box) but let me tell you that reformating and reinstalling is not always the best option :)

$,=42;for(34,0,-3,9,-11,11,-17,7,-5){$*.=pack'c'=>$,+=$_}for(reverse s
+plit//=>$*
){$%++?$ %%2?push@C,$_,$":push@c,$_,$":(push@C,$_,$")&&push@c,$"}$C[$#
+C]=$/;($#C
>$#c)?($ c=\@C)&&($ C=\@c):($ c=\@c)&&($C=\@C);$%=$|;for(@$c){print$_^
+$$C[$%++]}
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