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Description of problem:
After having created several volumes on a multipathed* device, i cannot remove them due to "Can't remove open logical volume "test-appli-fmtb"".

Having "strace"d the command, i can see the following:

# strace lvremove /dev/mstest/test-appli-fmtb
[...]
stat("/dev/mapper/control", {st_mode=S_IFCHR|0600, st_rdev=makedev(10, 63), ...}) = 0
open("/dev/mapper/control", O_RDWR)     = 22
ioctl(22, DM_VERSION, 0x6ad7f0)         = 0
ioctl(22, DM_DEV_STATUS, 0x6ad7f0)      = 0
write(2, "  ", 2  )                       = 2
write(2, "Can\'t remove open logical volume"..., 50Can't remove open logical volume "test-appli-fmtb") = 50
[...]
# fuser /dev/mapper/control
/dev/mapper/control:  7577
# ps auxwww | grep 7577
root      7577  0.0  0.0 11992 2880 pts/1    SLl  11:51   0:00 /sbin/multipathd


Version-Release number of selected component (if applicable):
lvm2-2.01.14-1.0.RHEL4 - device-mapper-multipath-0.4.5-5.2.RHEL4

How reproducible:
Always

Steps to Reproduce:
1. Setup vg and lv on a multipathed device
2. lvremove
  

Actual Results:  Having a message telling device is opened.
#lvremove mstest/test-appli-fmtb
  Found duplicate PV UuyQLW8HKbZyx7FcErZNPKb26a8Cn2Go: using /dev/dm-16 not /dev/dm-0
  Found duplicate PV HAmnK5TdygakIw1BfnhXq1juE8eT0lth: using /dev/dm-17 not /dev/dm-10
  Can't remove open logical volume "test-appli-fmtb"

Expected Results:  Removal OK

Additional info:

Note about multipathed device:
The Physical device used is a LUN created on an EMC² CX700 array accessible through 2 FC Qlogic qla2340 HBAs (4 paths).

# multipath -ll
mstest-lun2 (36006016062101500e279f1e3ed13da11)
[size=300 GB][features="1 queue_if_no_path"][hwhandler="1 emc"]
\_ round-robin 0 [active]
  \_ 1:0:0:1 sdc  8:32    [ready ][active]
\_ round-robin 0 [enabled]
  \_ 1:0:1:1 sde  8:64    [ready ][active]
\_ round-robin 0 [enabled]
  \_ 2:0:0:1 sdg  8:96    [ready ][active]
\_ round-robin 0 [enabled]
  \_ 2:0:1:1 sdi  8:128   [ready ][active]

mstest-lun1 (36006016062101500da9fbdcdd20fda11)
[size=200 GB][features="1 queue_if_no_path"][hwhandler="1 emc"]
\_ round-robin 0 [active]
  \_ 1:0:0:0 sdb  8:16    [ready ][active]
\_ round-robin 0 [enabled]
  \_ 1:0:1:0 sdd  8:48    [ready ][active]
\_ round-robin 0 [enabled]
  \_ 2:0:0:0 sdf  8:80    [ready ][active]
\_ round-robin 0 [enabled]
  \_ 2:0:1:0 sdh  8:112   [ready ][active]