Many charactures have to be escaped in regex's...

try changing:

$content =~ s/<!--\n//;

to

$content =~ s/\<\!\-\-\n//;

and

$content =~ s/\n-->//;

with

$content =~ s/\n\-\-\>//;

update:I put the code I provided in code tags. I appologize for the low quality of this post. I just started working on a reply when my fiance' tossed my laptop aside and ravanged me. (Kind of like the story of St Kevin but without the nettles, or the nunery) How un-monk-like! I might take another stab at this later.