Early in November I purchased the Lian Li AC-75 and just got my motherboard from intel last week. I put the unit together and after installing windows I noticed a rattle noise, almost like a cable stuck in a fan blade. Quickly I shut the unit down and saw no cables, figured it was ok. Started the machine again and heard this noise and it got worse and worse I immediately shut the system down and pulled the front cover off and examined all 3 fans, I noticed the top fan had a blade broken off. I sent Lian Li support and email but have not heard back in 48 hours so I am posting here. I have also included two images.

http://sdrv.ms/Ixbir0
http://sdrv.ms/19ntfyM