There is an immediate mandatory upgrade for all B&C Exchange users.

Downloads:

B&C Exchange 3.0.1 for Linux

B&C Exchange 3.0.1 for Windows

OS X builds are coming very soon.

Changes:

B&C Exchange release 3.0.1 has an adapted implementation of BIP 0066 as its only change from the prior 3.0.0 release. This release fixes a consensus bug.

Visit https://bcexchange.org to get the latest download clients.