@inlovewithpda @blami
Damn, just saw your post and had a look. My #fw12 has exactly the same cracks...
I will contact them as well. I guess you will hear from them first, so any update is welcome. :)

EDIT: Framework recommends that you contact support if you notice this on your laptop! I’ve had my 12 since the 18th of July and I’ve been using it daily for various tasks, It spends most of the time either in laptop mode while I play Rim World or in tablet mode while I draw on it. I haven’t been rough with it and it hasn’t been dropped once. Am I over reacting or should I contact support about this? Does anyone else have these subtle stress lines? They only appear around the hinges on the to...
@max @inlovewithpda @blami thanks for the tip, I hadn't checked the forum in a while (ever? 🤣).
They will send me a replacement bottom cover. Based on the thread in the forum, the new covers might actually be holding up.
@max @inlovewithpda @blami https://community.frame.work/t/important-update-framework-laptop-12/75234/20
Here is a brief summary what they changed.

Update on Framework Laptop 12 Bottom Covers Quality is our priority. Originally we received reports of hairline cracks showing on our Framework Laptop 12 bottom covers. When we previously investigated this, we identified two contributing factors (below). We’ve recently received some additional reports from customers receiving what appeared to be the older stock material - and we’re making it right. The Manufacturing Fix: We’ve modified our input material and injection molding parameters, as we...