This test has somewhat flakey, but has been failing consistently since:

http://mci.10gen.com/ui/task/mongodb_mongo_master_rhel_57_64_bit_2d14d3fd473713be56a634dc3d17ac46d85450e1_13_10_29_16_03_05_durability_rhel57

There's an assert failure in the logs that looks like:

assert failed : closeAllDatabases res.ok=false
Error: Printing Stack Trace
at printStackTrace (src/mongo/shell/utils.js:38:15)
at doassert (src/mongo/shell/assert.js:6:5)
at assert (src/mongo/shell/assert.js:14:5)
at f (/data/mci/git@github.commongodb/mongo.git/master/jstests/dur/closeall.js:81:9)
at /data/mci/git@github.commongodb/mongo.git/master/jstests/dur/closeall.js:101:17
2013-10-29T13:30:52.242-0400 assert failed : closeAllDatabases res.ok=false at src/mongo/shell/assert.js:7
failed to load: /data/mci/git@github.commongodb/mongo.git/master/jstests/dur/closeall.js