After writing the disc normally, the lead-out begins...when the status bar reaches the end it hangs. It hangs for more time than it takes to burn the CD (around 9 or 10 minutes for a disc it took 6 minutes to burn), and then this happens...
I've tried burning like 5 discs already with two different types of media (Sony and Verbatim--I doubt the media has anything to do with this) and this happens every single time.
Also, I'm using a Sony DRX-820UL-T (it's an external) connected via FireWire. EAC, as well as Nero, identify it as a Sony DVD RW DRU-820A Adapter: 2 ID:0 (firmware, according to Nero, is 2.0c, which is what the model came with, and which is, according to Sony, the only firmware currently available for this particular burner.)
EDIT: I forgot to mention that the resulting discs always seem to be fine (but that, of course, doesn't mean this is all right...)