Comment 11 for bug 386239

fresh installed Karmic:

Made a USB-Stick with "USB Startup Disk Creator" and used it for installation on another PC. After that, plugged in, but FAT32 partition didn't get recognized (USB stick 100% healthy, tested with H2testw):

[ 6106.078843] scsi 6:0:0:0: Direct-Access ST 8GB 0000 PQ: 0 ANSI: 0 CCS
[ 6106.079293] sd 6:0:0:0: Attached scsi generic sg2 type 0
[ 6106.086837] sd 6:0:0:0: [sdb] 15663104 512-byte logical blocks: (8.01 GB/7.46 GiB)
[ 6106.087817] sd 6:0:0:0: [sdb] Write Protect is off
[ 6106.087820] sd 6:0:0:0: [sdb] Mode Sense: 43 00 00 00
[ 6106.087823] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 6106.091315] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 6106.091325] sdb: sdb1
[ 6106.099445] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 6106.099453] sd 6:0:0:0: [sdb] Attached SCSI removable disk
[ 6109.720253] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 6109.720259] sdb: unknown partition table
[ 6109.981650] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 6109.981658] sdb:
[ 6120.339900] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 6120.339907] sdb: unknown partition table
[ 6120.544984] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 6120.544992] sdb:
[ 6158.603145] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 6158.603158] sdb: unknown partition table
[ 6158.918527] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 6158.918534] sdb:
[ 6166.285652] usb 1-1: USB disconnect, address 4
[ 6166.289601] sd 6:0:0:0: [sdb] Unhandled error code
[ 6166.289609] sd 6:0:0:0: [sdb] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
[ 6166.289621] end_request: I/O error, dev sdb, sector 29794
[ 6166.293849] sd 6:0:0:0: [sdb] Unhandled error code
[ 6166.293857] sd 6:0:0:0: [sdb] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[ 6166.293866] end_request: I/O error, dev sdb, sector 782
[ 6166.293879] Buffer I/O error on device sdb1, logical block 360
[ 6166.293886] lost page write due to I/O error on sdb1
[ 6166.295138] sd 6:0:0:0: [sdb] Unhandled error code
[ 6166.295143] sd 6:0:0:0: [sdb] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[ 6166.295152] end_request: I/O error, dev sdb, sector 542
[ 6166.295159] Buffer I/O error on device sdb1, logical block 240
[ 6166.295165] lost page write due to I/O error on sdb1
[ 6166.295173] Buffer I/O error on device sdb1, logical block 241
[ 6166.295192] lost page write due to I/O error on sdb1
[ 6166.295199] Buffer I/O error on device sdb1, logical block 242
[ 6166.295205] lost page write due to I/O error on sdb1
[ 6166.295212] Buffer I/O error on device sdb1, logical block 243
[ 6166.295218] lost page write due to I/O error on sdb1
[ 6166.295226] Buffer I/O error on device sdb1, logical block 244
[ 6166.295232] lost page write due to I/O error on sdb1
[ 6166.295239] Buffer I/O error on device sdb1, logical block 245
[ 6166.295245] lost page write due to I/O error on sdb1
[ 6166.295252] Buffer I/O error on device sdb1, logical block 246
[ 6166.295258] lost page write due to I/O error on sdb1
[ 6166.295265] Buffer I/O error on device sdb1, logical block 247
[ 6166.295271] lost page write due to I/O error on sdb1
[ 6166.295279] Buffer I/O error on device sdb1, logical block 248
[ 6166.295285] lost page write due to I/O error on sdb1

BUT: USB stick still works! I can use it for installing Ubuntu.

SIDE-EFFECT: My mounted data-partition (registered in /etc/fstab) showed up twice (!!!) in Nautilus side pane when I plug in USB stick.

There are some serious problems!