Calm down folks. I just posted it to let people know it happens even to developers, and have read what people suggested, but none of those fixed my particular issue. Every time I try one of those fixes things seem to just get a little worse so I'm afraid to touch it now...
I read something last night where someone had networking problems and they ran a script to reset the network card. I'll try and find it
Yes I saw that thanks, it was about the BBB dhcp implementation. Didn't help me.
Think I should be satisfied that it's mining at all and leave it, but the hardware's too new to stop developing for it just yet

Go back to 0.98.1, it's more reliable for many. Most people abandonded 0.99 as a lame duck.