I remember getting this message before their update two times (different dates); on both occasions I just tried again 5 mins later and it worked.
I did, several times, now I just did it again, hours later - same result.
also: I have sent a message to support, got a "false" reply (one that pertains to adding me LTC to my account), corrected it in a reply, then - nothing ....
so I am extremely suspicious now. However my amount is very small, cheating me out of 1.4 LTC really does not make much sense except they are about to close shop and dont care anymore.
-sam