Since upgrading to 1.7.4p4, sudo -i seems to escape commands with backslashes. 

Config:
Cmnd_Alias   COMMAND=/bin/bash -c /var/tmp/a.sh ,/var/tmp/b.sh
foo         ALL=(bar) NOPASSWD: COMMAND


Command:
foo$ sudo -u bar -i /var/tmp/a.sh
Sorry, user foo is not allowed to execute '/bin/bash -c \/var\/tmp\/a\.sh' as bar on host

The config and commands work fine on 1.7.0, but get the same behavior on 1.7.3 and 1.7.4p4

Not sure if this is related, but this also fails on 1.7.4p4, but works fine on 1.7.0 and 1.7.3 :
foo$ sudo -u bar /var/tmp/b.sh
cannot access parent directories

Just to make sure it has nothing to do with the shell, I've tried the same with ksh with the same results.