Occasionally, spelling matters, even for programmers. Spelling sometimes means the difference between a proper name and a simple noun (but sometimes it doesn't). Spelling and punctuation can even serve as a sign that you know something about a subject. (Imagine trying to discuss Battlestar Galactica, meterology, or tea if you don't know the difference between a Cylon, Ceylon, and a cyclone.)
Spelling--and spacing--even matter in programming. There's a big difference between
print FOO $blah; and
That applies outside of programming even more. If I want to hire a system administrator, try not to use the words "Lunix" or "Ubutno" or "Debean". If you're a Perl expert and can create your CV or message on anything other than a telegraph, try not to use the word "PERL". If you can't even get the name of a thing right--or worse, you don't care, how am I to know that you have skill with that thing?
If you're anyone other than Uri Guttman, please try to find the shift key on your keyboard once in a while. (I've given up.)
If you want to talk to me about Perl 6 and your space bar is broken, send me a private message and I'll send you a message with extra space characters you can copy and paste royalty free. I promise.