Broken ACLs when "zfs send"ing a snapshot from a Linux machine to Solaris

I'm running ZFS on a Ubuntu machine that hosts our home directories. The pool has the following ACL setting:

# zfs get all homes | grep acl
homes  aclinherit            restricted             default
homes  acltype               off                    default

Here I have two regular files with the same permissions:

# getfacl 1.txt 2.txt 
# file: 1.txt
# owner: usr
# group: grp
user::rw-
group::r--
other::r--

# file: 2.txt
# owner: usr
# group: grp
user::rw-
group::r--
other::r--

Every night I send an incremental snapshot to a machine running ZFS on Solaris 8

zfs send -i homes@$PREV_BACKUP homes@$CURRENT_BACKUP | \
   ssh solarishost zfs receive -vFd homes_backup

The file system on the Solaris host has the following ACL settings:

# zfs get all homes_backup | grep acl
homes_backup  aclmode               passthrough            local
homes_backup  aclinherit            restricted             default

When I inspect the files in the snapshot on the Solaris host, I see that the more recent one (1.txt) does not have any ACLs set:

# /usr/bin/ls -v 1.txt 2.txt 
-rw-r--r--   1 2428     2000        2170 Oct 12 13:42 1.txt
-rw-r--r--   1 2428     2000        2146 May 31  2013 2.txt
     0:owner@:execute:deny
     1:owner@:read_data/write_data/append_data/write_xattr/write_attributes
         /write_acl/write_owner:allow
     2:group@:write_data/append_data/execute:deny
     3:group@:read_data:allow
     4:everyone@:write_data/append_data/write_xattr/execute/write_attributes
         /write_acl/write_owner:deny
     5:everyone@:read_data/read_xattr/read_attributes/read_acl/synchronize
         :allow

Now when I mount the solarishost-snapshot on a Ubuntu client, I can see the files and they appear to have identical permissions, but I cannot read 1.txt:

# cat 2.txt >/dev/null; echo $?
0
# cat 1.txt >/dev/null; echo $?
cat: 1.txt: Permission denied
1

Again, the look the same to the Ubuntu client:

# getfacl 1.txt 2.txt
# file: 1.txt
# owner: usr
# group: grp
user::rw-
group::r--
mask::rwx
other::r--

# file: 2.txt
# owner: usr
# group: grp
user::rw-
group::r--
mask::rwx
other::r--

# ls -l 1.txt 2.txt 
-rw-r--r--+ 1 usr grp 2.2K Oct 12 13:42 1.txt
-rw-r--r--+ 1 usr grp 2.1K May 31  2013 2.txt

My question is now: how do I set up the snapshot creation from Ubuntu to Solaris such that the ACLs on the Solaris host allow users to mount the snapshots and read their own files? Looks like all recently backed up files are affected.