There is a "refresh" button next to account balance - anyone that didn't think to try it when looking at the wallet really seems to not be trying all that hard. Idiosyncratic, yes. Bug, no I don't think so. Somehow the rest of us have been dealing with it for many months now.
you think nobody thought to press refresh button

, be serious. Balance only became visible after pressing withdrawal for 0.001.
Apologies - I thought people didn't try the refresh. I haven't seen that before - I guess BTCT hasn't seen an influx of BTC like that before either.