Sorry to say but I have been fighting this and other problems with my Dell printer as well.  I just didn't mention the wrinkles because I was still working on correcting the image quality and printing features of teh software.  As you found out neither the tech support  or service people can help.  I too have had a replacement printer with no improvement.  the only clue I can give you is to keep badgering Dell.  If all of who have problems do this then maybe they can get some fixes in place.

Did you find out yet that they ship the 3000cn with only 1/4 full toner cartridges?  3100's have full cartridges but you pay more and they don't tell you the difference..

Has anybody found a solution to the wrinkling problem?  They offered me a new printer, but I declined, as I wanted to try the fix first.  They say they are going to have a tech come to my home and replace the vertical transport.  It sounds like that me be a waste of effort.  Do you think it will be?

What percentage off did they offer you?  Was it during the 21 day return period, or after?

Any help would be appreciated.

Jim

I be interested also I just got a 3000cn because I had two 3100cn which I love I would not want to keep the 3000cn but tech support said the 3000cn would work with size 10 envelopes. that was not true first out of the box problem.

I just got off the phone with Tech Support for over an hour.

The bottom line is the 3000cn, which is dubbed as a "business" printer is a piece of sh_ _!  The tech rep. said there is a known design flaw that causes the  #10 envelope to crease at the lower left edge.

He said the only Dell printer that works is the w5300n, which is B&W only.  He is sending me a new fuser as the last ditch effort before I return this piece _ _ S_ _ t!.

I have a HP 3550 Color laser in the office as well and it works well with envelopes as it has a separate feeder.