Removing items from an Array

[Mars]

Hello everybody.
Once again I have a little question, this time about removing 
items from an assoc array in a foreach.

Why does the following code:
http://pastebin.com/65P9WDNS
Result in this output:
http://pastebin.com/4FzEE1zi

It seems rather strange to me. I'd expect the foreach_reverse to 
go over the array from the end to the beginning, and when I 
remove stuff from it, it shouldn't be a problem. But apparently 
it is.

Mars