I can think of two mispellings that seem to be prevailing over their correct versions. Tounge for tongue and looser for loser. Any others?
I can definately think of one.
Someone in another thread commented on the distressing prevalence of perscription, and then a few days later I saw someone else use it a couple of times.
‘Teh’ for ‘the’ is the one I hate most, mostly because I’m so often guilty of it myself. Also ‘myslef’ for ‘myself.’
But then there are the deliberate ones: ‘Lite’ for ‘light,’ and so on…
shrug I guess that’s how language evolves.
Oh, musn’t resist this one… ‘Nuculer’ for ‘nuclear…’
Gaudere’s whatsitz strikes again with the thingy that it does!
Perhaps you meant misspelling? 
Alright, what is it?
Aha well ya see I was being… eh… pobody’s nerfect.
Gaudere’s Law is interesting. I hadn’t heard of it before now Fish. Thanks.
inconvience instead of inconvenience
sight for (web)site, peek or peak when they really mean pique. There are a lot of homophones that get switched on the internet.
Per the OP, don’t you really won’t to type “allright”?
This one may have already been used, but what about “just desserts” for “just deserts”?
Dammit, that was me, not my husband. I forgot that the pc automatically logs him in first.
Sorry.
I considered adding a smiley, but I hoped people wouldn’t get whooshed.
One I’ve seen but not that often is Pre-Madonna for Prima Donna.
Thru
I came in here to post that. The word is THROUGH, dammit! Thru is a poetic contraction! Gah!
I saw that once in an e-mail; I almost fell down.
People are starting to loose the ability to spell, but spelling is easy, is and it?
Yes, I have really seen “is and it”.
“could/would/should OF” is probably the number one now. It might almost be a lost battle, that one.