They are not the only ones...bucket shop etxcapital (perhaps their prime broker is saxobank?) said this:
Please be informed that due to today’s exceptional market movement in CHF crosses, we have been filling clients’ orders and positions in an extremely illiquid market.
As such, we are now reviewing all executed fills and we will amend them to more accurate levels. This may result in a worse execution rate than the originally filled level.
Please keep in mind that, therefore, the balance in your account(s) might change and your trading activity be affected.
Should you have any questions regarding our market trading hours please contact 0800 138 4582.
Kind Regards,
ETX Capital