I have also encountered issue with the connection and changes in WEBD amounts in my wallet. I guess due to the poor connectivity i experienced a forked block, as I have read here in the discussion. Indeed the mining is becoming more and more hard, altough it has only been two days since main net release. For example i left my PC to mine last nigh and all day today, and i have only mined 6,000 WEBD. I should mention that I do have a very good connection to the internet and I have about 1,600 hash/sec mining power. Any suggestions?