Linksys Wireless Router :: E4200 - Incredibly Slow Transfer Speeds?

Using 1.0.03.
 
I am seeing something pretty bizarre: when trying to copy files between two computers (both Windows 7 SP1 64bit), both physically plugged into the back of the E4200, I see extremely slow transfer speeds: 1.0-1.1 MB/sec.  Both computers are fast (i7-2600K, both using SSDs) and both have gigabit ports (and the 4200's web UI shows both ports in question as operating in gigabit mode).
 
This is so slow as to be sort of funny.  Each of these computers see speeds well in excess of that when transferring between the computer and outside internet sites...so it's kind of funny that two computers plugged into the same switch in the back of the 4200 see 1 MB/second.