Hi, and apologies for my lack of understanding of BTC.

I was sent BTC by a third party today around 2pm CST and the transaction is still pending. I've read a little bit about the delays but I'm still not quite understanding. Can someone help me determine if the sender sent this with an inadequate fee or made some other mistake? I don't want to accost them or ask them to take further action without due cause.

I'm trying to receive the transaction on coinbase. I can post the blockr.io transaction details if that will help. I didn't post initially because I was unsure if that details page contains information (mine or the senders) that I shouldn't be posting publicly.

Thanks for reading.