I was kind of busy with something else, so I did not notice that kind of activity, and I had not realized that trading had been frozen until I saw the message on this thread.

Hopefully, their issue is not too major.  I recall that last year (maybe it was even late 2014-ish), on several occasions, Bitfinex had issues and shut downs, and I believe that they had lost some credibility because of going through those issues.  We always hope that they are learning from these kinds of issues, and that the corruption (if any) is not coming from within the exchange itself.. and if they lose coins, then they are able to contain it to small amounts (even though frequently, there tend to be self-imposed limits in the degree to which they are willing to be completely transparent about what is happening and their fixes).  Also, Bitfinex has several more complications on their exchange, as compared to bitstamp, based on the kinds of additional trading that they allow (including marginal trading and shorting)