Seems to be since the last server update, though I can't 100% confirm that. Training arrows look like 3 "u"s at the top of the window and training bolts are just blank. No updates on my system in the timeframe. My system is running the latest 1.9.2 client on 64 bit Gentoo Linux and this was confirmed by a windows user as well, so it doesn't seem to be platform dependent. Attached are screenshots showing storage and inventory windows as well as showing one of the arrows worn. Can't think of any other info to present at this time, but feel free to ask.
Training arrows are in slot 2 of sto and 4 of inv, Training bolts are in slot 4 of sto and 5 of inv.
Screenshots