I spoke to my RA-4 Paper supplier recently (Fuji + Kodak) and got an interessting tidebit, where he mentioned that the sensitivity gap of the new papers (the "digital" papers) is not the 590 nm anymore but 620 nm, and I indeed have problems with blue casts on RA-4 with the safelights on. (Osram Duka 10)
Anybody else observations on this?