Digital BW, The Print

I've been using MIS UT2 inks in my 1280 for a couple of years with no 
problems.  Windows XP SP2, calibrated monitor, Picture Window Pro 
with color management off, Paul Roarke curves (usually EEM neutral).  

I bought and installed a new UT2 cartridge in the printer last week.  
As soon as I installed it, my prints started printing lighter, and 
with a significant bluish tinge to them.  With the old cartridge (and 
all previous ones), I had WYSIWYG with the screen.  With the new 
cartridge, it's too light and too blue.  It's like all the light and 
mid-tones have been lightened one zone.  

In fact I had a file up in PWP when I changed the cartridge, and had 
printed it just before and just after the cartridge change.  The same 
thing happens with other files, so it's not a problem with that one 
file.

I talked to MIS tech support, and they are trying to convince me that 
I've changed my settings somehow.  I've checked and double-checked, 
and everything appears the same.

When I changed the cartridge, I ran the usual two cleaning cycles, 
and a nozzle check. Didn't get a perfect pattern, so I printed a junk 
print, ran two more cleaning cycles and nozzle checks, and got a 
perfect pattern.

Does this sound familiar to anyone? 

Aaargh!
--Peter