As segwit is active on testnet, blocks will only be downloaded from NODE_WITNESS peers. Though, exactly those peers are disconnected after `BLOCK_STALLING_TIMEOUT = 2` seconds. I am running master (6e6ab2c)

This behavior is consistent across restarts. Sample [debug.log](http://pastebin.ubuntu.com/23058327/) and [getchaintips](http://pastebin.ubuntu.com/23058325/).

It is possible that I shot my own foot at some point, but it seemed smelly enough to create an issue.

else if (strCommand == NetMsgType::FILTERLOAD)
    {
        CBloomFilter filter;
        vRecv >> filter;
        LOCK(pfrom->cs_filter);
        if (!filter.IsWithinSizeConstraints())
        {
            
            LOCK(cs_main);
            Misbehaving(pfrom->GetId(), 100);
        }
        else
        {
            delete pfrom->pfilter;
            pfrom->pfilter = new CBloomFilter(filter);
            pfrom->pfilter->UpdateEmptyFull();
        }
        pfrom->fRelayTxes = true;
    }
    else if (strCommand == NetMsgType::FILTERADD)
    {
        vector<unsigned char> vData;
        vRecv >> vData;
        
        
        if (vData.size() > MAX_SCRIPT_ELEMENT_SIZE)
        {
            LOCK(cs_main);
            Misbehaving(pfrom->GetId(), 100);
        } else {