an indication of something, but
as you still have peers, it does not appear
to be the source of the troubles..
Since you wrote "internal miner" I assume
you're trying to mine from graphical wallet console?
You could try building the headless client mycoind
and put these into the conf
daemon=1
listen=1
and then mine from the commandline
,/mycoind setgenerate true
If this does not help, try external scrypt miner,
https://bitcointalksearch.org/topic/a-how-to-guide-for-solo-mining-521563
it might spit out some info what is wrong
Btw: thanks for trying to help me out, I know you're doing this on your own time and you don't owe me anything, so your help is greatly appreciated
No prob, I have been in the same boat,
figuring out connection problems more times
than I care to remember
Thanks
I'll try these steps this evening and give some feedback tomorrow!