I worked for a place that did remodelling as well as service. (Same place that I was the F&P warranty tech).
The steam is normal, it's supposed to come out of the vent. Granite will always be cool enough to cause condensation.
The remodelling people should have known about this, and compensated for it.
The only trick I know is to move the dishwasher slightly forward and reinstall it to stay that way. The idea is to get the steam to rise straight up without contacting the granite.
If you don't do that, or find another way, that condensation is going to get into the cabinet wood and cause it to swell.
If you can, get on your contractor's ass and have them fix it.
FYI: This issue is VERY common with Fisher Paykel dish drawers. They come with the options set to open the lid when the cycle finishes and that lets a bunch of steam out. You can set the options on dish drawers to keep the drawer locked after a cycle until it's powered on.
Edited by ScottsApplianceRepar, 14 March 2013 - 06:33 PM.