[chrismorgan]

Just like “until” is commonly shortened “till”, “around” is commonly shortened as “round”.

[callumlocke]

I know this doesn't affect your point, but it's interesting: "till" is older than "until".

http://etymonline.com/index.php?term=until

[philh]

Thanks to the "you see what you expect to see" effect, it took me until someone pointed out the pun before I realized the word was "round" and not "around".