The USMLE Step 2 CK exam recently began its migration to new test delivery software, which incidentally was designed to include a calculator function. The NBME has identified problems with this function and advises not to use it until further updates are posted.

The new software will be deployed at sites across the country throughout August and September, beginning August 14th. The Step 1 and 3 software transition will not occur until 2009.

The new orientation and practice materials are available here:
http://www.usmle.org/Orientation/2008/menu.html

It is strongly recommended that you familiarize yourself with the instructions and software in advance of the test date in order to save your energy for what matters most!

Also note that as a result of the software transition, scoring delays are expected. The score reporting target date for August-September Step 2 CK test-takers is October 8, 2008.

Finally, USMLE has decided to allow soft-foam earplugs during all exams (Step 1, 2CK and 3), so long as they are out of the package upon arrival (subject to inspection) and are left at the workstation during breaks. Great news!