I recently set my Epson R2400 up with my mac mini i3 running OS X 10.7.5 and now every time I try to print using the ICC profile provided for colorado fiber gloss I get a very very slight magenta cast to the black and white print. I've double checked that there are no competing profiles, color management turned off in printer, managed by lightroom or photoshop using the profile for the paper provided here. Turning off color management and letting the printer manage colors yields a very neutral black and white print. Any ideas?

I use Colorado Fiber Gloss for black & white on an Epson 3880, but use the ABW (Epson's black & white printing control). (I believe the 2400 has the same set of controls). The ABW allows fine tuning of black & white tone. Look for the color tone wheel in the Advanced Black and While control panel). My black & white prints on the Colorado Gloss are as close as I have ben able to come to matching true gelatin silver prints, much better than anything I can get using a color icc profile. I recommend that you let the Epson ABW manage black & white rather than Photoshop. (For color, I use the Photoshop color engine).

Have you used the Advanced B&W printing procedure yet? This will yield the best results for B&W and is intended to remove any color casts.

I'll work with the ABW more, thanks for your suggestions. I was just curious as I had been using the icc profile when I was using an imac and OS X 10.6 and seemed to get great BW results.