As a test, I have changed the transceivers on both ends of the link on 4/1/1 to 1 GB units, that link is currently stable (18 hours into the change)
Here's is the output from another link that gave me trouble that is currently working but still at 10GB.
(STACK-C) #show interface gigabitethernet 6/1/0 transceiver
Vendor Name : OPNEXT, INC.
Vendor Serial Number : L12E36915
Vendor Part Number : TRS2001EN-0065
Aruba Certified : YES
Cable Type : 10GBASE-SR
Connector Type : LC
Wave Length : 850 nm
(STACK-A) #show interface gigabitethernet 0/1/1 transceiver
Vendor Name : OPNEXT, INC.
Vendor Serial Number : L12E38320
Vendor Part Number : TRS2001EN-0065
Aruba Certified : YES
Cable Type : 10GBASE-SR
Connector Type : LC
Wave Length : 850 nm
I will enable the traceoptions on both ends of that link and report back.