Working fine for me. What settings are you using in terms of the image’s embedded profile, what you select in Photoshop’s Print dialog?
I'm using a colour managed workflow (Photoshop Manages Color) ... the same as espoused by Eric Chan on his 3800 pages. The image profile (specifically its gamma) isn't relevant as the linearization profile will translate, plus correct any deviations from non-linearity. This method also permits soft-proofing.
Unfortunately it produces incorrect results with CS5 and/or 10.6 on a Mac. I don't have a 3800 but suspect anyone using Eric's profiles will be seeing too light or dark results. As most are painfully aware, Apple have been mucking around with the printing subsystem for some time and unfortunately it's necessary to retest after each CS/OS release.
The following is the method I use to evaluate B&W (and colour) output for linearity, gray-balance/neutrality, shadow detail etc:
Download the QuadToneRIP package (www.quadtonerip.com
). From this we don't need the driver, just some of the bits in the package. Open the Step-51-gray.tif or Step-51-random.tif stepwedge and assign the included
"QTR - Gray Lab" profile (this is necessary as we're going to graph the output with L* on the vertical axis). Print and measure with MeasureTool (or equivalent) and drag the measurement file onto QTR-Linearize-Data.app (or QTR-Create-ICC.app) and view the results. If you're serious about B&W this will tell you everything you need to know, how your driver settings are performing. If anyone is interested in doing this, post the output file here and I will tell you how to interpret the results, what to look for etc.