Not a new warning, just typical FDA. From FDA site in 2004.
"Q: What happens if I consume more the recommend amounts of omega-3 fatty acids?
A: Some scientific studies show that consumption levels well over 3 grams per day may lead to excessive bleeding. Therefore, FDA recommends that consumption not exceed 3 grams per day from all food sources."
There has been lots of studies on this with conflicting results. Everyone agrees that omega 3's inhibit platelet aggregation, etc, which is a good thing for preventing stroke. The arguement is whether that could possibly lead to bleeding problems. Most studies involving eskimos (who based on their fish diet, eat more than fda recommends) have no bleeding tendencies.
I eat canned salmon 2x per day, and get about 4-5g omega 3's to balance out my 6. If I were 80 and on coumadin, and were worried about a hemorrhagic stroke, I might consider the fda guidelines. See studies below.
Or go to google scholar and search omega 3 and bleeding time.