Grumpy_Mike:
The brown out voltage is not related to the supply voltage it is fixed. See the data sheet.
Right.....brown out voltage is 2.7V based on the arduino fuse bit settings. I'm just wondering if the 8 mil traces could cause a significant voltage drop (from 3.3V to below 2.7V) when, for example, a pin connected to an LED turns on? If you need more information, please let me know.