wut?

With guesses in brackets and the bits where I couldn't figure it out in italics, I believe that it says:
"To Whom It May Concern:
It has come to our attention that you a(re the autho)r of
a webcomic which features computer(s I don't know)nor and
a feline character, but you have not d(one a strip) about
said feline character preying on a com(puter "mous)e".
This is a grievous omission, in violation (of code numbers)1.3,
and we must ask you to correct th(is mistake soon) or
you may risk losing your web-car(toonist's your guess is as good as mine)
licence. You have 30 days from now..."

That help?

hahaah
yes, thanks

Very close! See the actual text further down.

Sorry, you lost me with that one.

<see above comment>

Actual text posted below now!

Uhoh!!! (grin)

To Whom It May Concern:

It has come to our attention that you are the author of
a webcomic which features computer-related humor and
a feline character, but you have not drawn a stsrip about
said feline character preying on a computer "mouse".
This is a grievous omission, in violation of section 501.3,
and we must ask you to correct this matter immediately or
you may risk losing your web-cartoonists license.
license. You have 30 days from receipt of this letter

Hey, I did pretty good! Although the "license license" thing kinda threw me. :P

I tried to tweak the text so that enough of it was visible to make sense. License is a pretty key word.