If your dictionary has an entry whose key is "..." then when you attempt to look up a key with ITEM key OF dictionary and the key isn't in that dictionary, we look in the dictionary that's the value of "..." (and same in that dictionary's "..." if the key still isn't found, recursively).
The reason it's "..." instead of "parent" is to avoid translation issues.
As a side note, as I was searching for these, I found out that chrome now gives you a shortcut to the clear browsing data screen (where you clear cache) when you type "clear cache" into the address bar, which is pretty handy.
I guess you feel it’s all your fault. It isn’t (at least not entirely), and your feeling guilty doesn’t help anyone. For starters, why can’t jens make sure every block introduced or updated be accompanied by an up-to-date online help text?