Just clicking around today I noticed that the conditions don't work if you don't have any nodes.
I realize this is an edge case, but if people start mimicking core conditions, they'll hit more realistic bugs.
I'll check through other plugins to see if they need similar treatment.
FAILED: [[SimpleTest]]: [PHP 5.4 MySQL] Unable to apply patch node-condition-PASS.patch. Unable to apply patch. See the log in the details link for more information. View
FAILED: [[SimpleTest]]: [MySQL] 52,627 pass(es), 0 fail(s), and 1 exception(s). View