Description of problem:

accept4(7, 0xc2001be540, [112], SOCK_CLOEXEC|SOCK_NONBLOCK) = -1 EAGAIN (Resource temporarily unavailable)
read(9, "POST /v1.7/containers/create HTT"..., 4096) = 550
clock_gettime(CLOCK_REALTIME, {1385557957, 704016349}) = 0
clock_gettime(CLOCK_REALTIME, {1385557957, 704076878}) = 0
clock_gettime(CLOCK_REALTIME, {1385557957, 704218620}) = 0
write(2, "[debug] api.go:1008 Calling POST"..., 52[debug] api.go:1008 Calling POST /containers/create
) = 52
futex(0xd0bef8, FUTEX_WAIT, 0, NULL2013/11/27 14:12:37 POST /v1.7/containers/create
[/var/lib/docker|237066b1] +job create()
[/var/lib/docker|237066b1] -job create() = ERR (ExportEnv json: cannot unmarshal bool into Go value of type string)
[error] api.go:1034 Error: create: ExportEnv json: cannot unmarshal bool into Go value of type string
[error] api.go:82 HTTP Error: statusCode=500 create: ExportEnv json: cannot unmarshal bool into Go value of type string
[debug] api.go:1008 Calling GET /images/json
2013/11/27 14:28:41 GET /v1.7/images/json

This issue exists when running docker-io-0.7.0-2.el6.x86_64 (unreleased) as daemon with following flag: -b none. 

[root@centos64 ~]# docker -v
Docker version 0.7.0, build 0d078b6/0.7.0