Hi all,
sorry to bring up an old thread but after some advice - I have just received this same message and am wondering if I should be worried. I'm hoping, as Lucius experienced, that when the transaction confirms all will fine but I think I'll have a niggling doubt about it even if all appears well. Will spending the same BTC going forward be an issue? I am running Multibit Classic v0.5.19 (and planning on changing to HD as soon as possible!).
Many thanks!
It could become an issue as more and more nodes upgrade with to those newer standardness policies as your transaction may not be relayed. I recommend that you upgrade your wallet as soon as possible so that you don't run into this issue.