I also seen a post where someone had made flashables to restore dalvik or to try ART.If you have adb up and running. Do this
adb pull /data/property/persist.sys.dalvik.vm.lib
open the generated file and replace the libart.so with libdvm.so
Follow that up with these commands
adb push persist.sys.dalvik.vm.lib /data/property/
adb shell chmod 600 /data/property/persist.sys.dalvik.vm.lib
(Not sure really if this one is needed our not, but it can't hurt.)
adb reboot
If you don't know how to use adb, then only a full wipe (not just cache and dalvik) will be your only fix. Hope that helps.
And yes this good to know Thanks