I'm going to keep this post updated with any errors that turn up, I will also correct the patterns as soon as I can so that the current version is always on Ravelry.
I have discovered that there is a bit of a booboo on the Penelope elephant pattern, (mostly a case of semantics so hopefully not too catastrophic) but when following the hippo body instructions line 4, where it says "20sc in front/lower loop of sl.st" - this bit has no relevance at all to the elephant and should just be 20sc as normal. Hopefully that's it.
OK, there is also an error on the Toast and Jam giraffe pattern....Rnd 3 of the Head should read "(2sc, inc, sc, inc, 3sc) 2 times". That'll teach me to mark the end of my rounds when I am testing the patterns :)
update: Jan 2013, an updated version of giraffe pattern is now on Ravelry so these errata should no longer apply