Why  +USE_UPNP:=1 ?  I thought setting this flag to 0 made it embed PNP (hence faster and more distributable to other machines).

Hrm, well my self-compiled primecoind doesn't seem to be working quite right... It's using the CPU cycles, but doesn't seem to have noticed there are new blocks. Current block is in the 8400s. 

C:\bitcoin-0.8.3-EasyWinBuilder-v0.1\primecoin\src>primecoind getmininginfo
{
    "blocks" : 8399,
    "currentblocksize" : 1000,
    "currentblocktx" : 0,
    "errors" : "",
    "generate" : true,
    "genproclimit" : -1,
    "primespersec" : 175,
    "pooledtx" : 0,
    "testnet" : false