Digital BW, The Print

I just pulled out a couple of prints i made on PGPP using UT2 (on a 
1280) a month or so ago. Both prints had been stored stacked with 
other prints (printed with oem inks, FWIW). The UT2 prints had 
roughly evenly spaced white marks, as if ink had come off. The 
evenness of the spacing makes me think something else was going 
on. 

I mostly print on matte, so i don't have much experience with UT2 
and glossy. has anyone else experienced anything like this?

Matt
--
Matt Haber
dance, portrait and fashion photography
http://www.matthaber.com