What are the concerns about eating flaxseed?

Some comments, laws etc. from government agencies which give an indication that there are problems associated with human consumption of flaxseed.

USDA - link - footnote at bottom of page says "Up to 12 percent flax seed can safely be used as an ingredient in food.", although this is a reasonable amount, it does mean there are concerns about over consumption.

FDA - link - shows that the GRAS (Generally Regarded As Safe) application was withdrawn. GRAS status has not been granted to date.

Health Canada - link - recommends that intake be limited in general, and should not be consumed if some medications are being taken

Government of France - link (Translation of Article 2-1 is shown below the original

Article 2-1
Créé par Décret n°78-840 du 9 août 1978 (JORF 11 août 1978).

La teneur en acide érucique des huiles, des graisses et de leurs mélanges, destinés tels quels à la consommation humaine, doit être calculée sur la teneur totale de ces produits en acides gras dans la phase grasse. Elle ne doit pas dépasser 5 p. 100.

“It is forbidden to have for sale, put on sale or sell under any name or form, for human consumption flax oil, either natural or mixed with other food products”