Hey, I've got a few errors that I've discovered while reading the tutorials...

Please bare with me, because I really didn't feel like searching for each issue seperately to see if they already exist...

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Issue 1:
http://processing.org/learning/basics/operatorprecedence.html

The problem lies in the description text:
"...example, in the statement "4 + 28", the 2 will first be multiplied by 8..."
There's a missing operator between 2 and 8.

Repeated error, same text:
"...is written as "4 + (28)"..."

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Issue 2:
http://processing.org/learning/basics/shapeprimitives.html

http://mobile.processing.org/learning/example.php?name=shapeprimitives

In description text for the former, comments for the latter:
"The basic shape primitive functions are triangle(), rect(), quad(), and ellipse(). Squares are made with rect() and circles are made with ellise()."

Note the "ellise()" instead of "ellipse()" at the end of both texts.
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Issue 3:
http://processing.org/learning/basics/functions.html

Not a typo this time - I believe that draw_target() should be renamed to drawTarget(), for consistency.