DCU is a great concept, and already seems very handy. But...
I just ran DCU, and (perhaps for the first time) it told me that itself and FARR needed updating. I clicked "DL & install all updates". Pretty soon a Firefox (18.104.22.168) download dialog appeared, but I had to wait about a minute before FF responded to my click on the dialog's "Save" button. This happened for both the DCU and the FARR downloads. Don't know if this is a DC or a FF issue, but it has not happened before with FF dl's.
I eventually ended up with two copies of the DCU download, and one copy of the FARR download, in my DL directory. Even if I clicked the Save button again while waiting, WTF?
Also, what is the point of calling the button "DL & install all updates" if it does not automatically go into the installation step? Seems like I had to manually run the two downloaded update files. Or am I missing something.