I just tried installing tomato-K26USB-1.28.RT-MIPSR2-108.trx on my Asus RT-N16. It took it about 10 minutes before I could connect to the web interface. I made a few changes, it rebooted then another 10 minutes or so. A few more changes, and the next time I wasn't so lucky. Reset, rebooted. After about 10 minutes I could connect. Attempted to re-install again. 25 minutes later, reset, rebooted again, finally I was able to connect after another 10 minutes. Finally after playing around with this build for about 2 hours trying to get it to work, I installed build 107. That worked without problems.
It seems something is really badly broken in build 108.