Thanks everyone for the input. To close the story, I showed the lenses to a guy in a local store and his opinion was that it's fungus. In both. I am returning them first thing monday.
On an unrelated topic: today I went shooting to check out these two lenses, to Charlestown (I live in Boston area). There's quite a spectacular industrial view: a multi-tier highway, a huge (almost finished) bridge, with Boston downtown skyline as a background. I was taking pictures when a guy came by and told me that I have walked into a restricted construction area where no pictures is allowed. I said "sorry", and moved back a dozen feet away, where's a public park. Then I went on shooting from the park, under the bridge, when the same guy together with 3 or 4 cops stopped me, searched me, wrote down everything from my driver's license, asked a lot of questions and took the film from the camera. They admitted that from where I was, it wasn't prohibited to shoot -- but the highway and the bridge is "sensitive area", and the argument ended there. I guess what I want to say, now that I am at home, after a drink -- I'm happy I'm not an arab... Just needed to share with someone. - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .

