Comment 3 for bug 1220187

This is suspicious:

Sep 3 10:50:42 lubuntu kernel: [ 384.303158] XFS (sda1): bad magic number
Sep 3 10:50:42 lubuntu kernel: [ 384.303174] de413000: 50 4d 00 00 00 00 00 05 00 00 00 01 00 00 00 3f PM.............?
Sep 3 10:50:42 lubuntu kernel: [ 384.303182] de413010: 41 70 70 6c 65 00 00 00 00 00 00 00 00 00 00 00 Apple...........
Sep 3 10:50:42 lubuntu kernel: [ 384.303188] de413020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
Sep 3 10:50:42 lubuntu kernel: [ 384.303195] de413030: 41 70 70 6c 65 5f 70 61 72 74 69 74 69 6f 6e 5f Apple_partition_
Sep 3 10:50:42 lubuntu kernel: [ 384.303204] XFS (sda1): Internal error xfs_sb_read_verify at line 780 of file /build/buildd/linux-ppc-3.11.0/fs/xfs/xfs_mount.c. Caller 0xf3ed9cdc
Sep 3 10:50:42 lubuntu kernel: [ 384.303204]
Sep 3 10:50:42 lubuntu kernel: [ 384.303217] CPU: 0 PID: 5 Comm: kworker/0:0H Tainted: GF C 3.11.0-1-powerpc-smp #2-Ubuntu
Sep 3 10:50:42 lubuntu kernel: [ 384.303404] Workqueue: xfslogd xfs_buf_iodone_work [xfs]
Sep 3 10:50:42 lubuntu kernel: [ 384.303412] Call Trace:
Sep 3 10:50:42 lubuntu kernel: [ 384.303430] [ef87fdc0] [c00098f8] show_stack+0xf8/0x1b0 (unreliable)
Sep 3 10:50:42 lubuntu kernel: [ 384.303444] [ef87fe10] [c06dfa0c] dump_stack+0x78/0xa0
Sep 3 10:50:42 lubuntu kernel: [ 384.303506] [ef87fe20] [f3edc970] xfs_corruption_error+0x78/0x98 [xfs]
Sep 3 10:50:42 lubuntu kernel: [ 384.303593] [ef87fe50] [f3f3c378] xfs_sb_read_verify+0x10c/0x12c [xfs]
Sep 3 10:50:42 lubuntu kernel: [ 384.303649] [ef87fe80] [f3ed9cdc] xfs_buf_iodone_work+0xb4/0xd8 [xfs]
Sep 3 10:50:42 lubuntu kernel: [ 384.303665] [ef87fe90] [c005c2e0] process_one_work+0x158/0x3c8
Sep 3 10:50:42 lubuntu kernel: [ 384.303674] [ef87fec0] [c005cc5c] worker_thread+0x134/0x3fc
Sep 3 10:50:42 lubuntu kernel: [ 384.303686] [ef87fef0] [c0064160] kthread+0xb4/0xb8
Sep 3 10:50:42 lubuntu kernel: [ 384.303696] [ef87ff40] [c0017140] ret_from_kernel_thread+0x5c/0x64
Sep 3 10:50:42 lubuntu kernel: [ 384.303702] XFS (sda1): Corruption detected. Unmount and run xfs_repair
Sep 3 10:50:42 lubuntu kernel: [ 384.303729] XFS (sda1): SB validate failed with error 22.
Sep 3 10:50:42 lubuntu ubiquity: mount: you must specify the filesystem type
Sep 3 10:50:42 lubuntu ubiquity:
Sep 3 10:50:42 lubuntu ubiquity: mount: wrong fs type, bad option, bad superblock on /dev/sda3,
Sep 3 10:50:42 lubuntu ubiquity: missing codepage or helper program, or other error
Sep 3 10:50:42 lubuntu ubiquity:
Sep 3 10:50:42 lubuntu ubiquity: In some cases useful info is found in syslog - try
Sep 3 10:50:42 lubuntu ubiquity: dmesg | tail or so
Sep 3 10:50:42 lubuntu ubiquity:

Do you have a log file from the install of the other operating system? Were there any errors?