Allright, a lot of missing information here..
I am the owner of the car picture in Newbies first post.
Last night i discovered the mold, snapped a pic and sent to Tesla along with posting it on our norwegian boards.
I right away cleaned off the "worst parts" as I didnt want it hanging there.
I got an e-mail response from Tesla within an hour asking for some more information. I am pretty sure they will follow this up closely.
The tape piece was places there as a part of a service bulletin for a squeaking pano roof - which Ive never had.
The roof does not leak. This is probably due to the tape being placed as it is, and that some parts of it will be on the outside of the rubber sealing the roof - thus being exposed to water and sucking it up.
The initial quess is that this roll of tape used on a batch of cars where the service bulletin is performed might have mold spores in it from before assembly.
Earlier today I created a poll on our norwegian boards asking wether or not the owners have experienced this. Now many have noticed, for their first time, that they have the same mold - or the beginning of it. 9 owners have as of now reported the mold.
I also, earlier today, created a thread here, before I saw this one, with a bit information and an even more detailed poll (as there are more weather considerations):
Mold on sunroof?