I have the same problem with a clean Ubuntu Hardy 8.04 installation.

I can copy some big files but others I can't. The original file isn't corrupted. The transfer speed is very very slow. I attach my log files. In windows works fine.

The pendrive is a 8Gb USB 2.0 Flash Disk  in a Linux 2.6.24-12-generic #1 SMP Wed Mar 12 23:01:54 UTC 2008 i686 GNU/Linux

The continuous error log:

[12894.060439] usb 2-2: new high speed USB device using ehci_hcd and address 22
[12894.193325] usb 2-2: configuration #1 chosen from 1 choice
[12894.207708] scsi9 : SCSI emulation for USB Mass Storage devices
[12894.212951] usb-storage: device found at 22
[12894.212960] usb-storage: waiting for device to settle before scanning
[12899.210550] usb-storage: device scan complete
[12899.211781] scsi 9:0:0:0: Direct-Access     USB 2.0  Flash Disk       5.00 PQ: 0 ANSI: 2
[12899.223506] sd 9:0:0:0: [sdf] 16384000 512-byte hardware sectors (8389 MB)
[12899.225375] sd 9:0:0:0: [sdf] Write Protect is off
[12899.225382] sd 9:0:0:0: [sdf] Mode Sense: 0b 00 00 08
[12899.225387] sd 9:0:0:0: [sdf] Assuming drive cache: write through
[12899.229746] sd 9:0:0:0: [sdf] 16384000 512-byte hardware sectors (8389 MB)
[12899.231373] sd 9:0:0:0: [sdf] Write Protect is off
[12899.231379] sd 9:0:0:0: [sdf] Mode Sense: 0b 00 00 08
[12899.231383] sd 9:0:0:0: [sdf] Assuming drive cache: write through
[12899.231392]  sdf: sdf1
[12899.233688] sd 9:0:0:0: [sdf] Attached SCSI removable disk
[12899.233755] sd 9:0:0:0: Attached scsi generic sg5 type 0
[12998.488627] usb 2-2: reset high speed USB device using ehci_hcd and address 22
[13016.752977] usb 2-2: device descriptor read/64, error -110
[ 7239.431809] usb 2-2: device descriptor read/64, error -110
[ 7239.647676] usb 2-2: reset high speed USB device using ehci_hcd and address 22
[13053.141648] usb 2-2: device descriptor read/64, error -110
[ 6528.282910] usb 2-2: device descriptor read/64, error -110
[ 6528.496265] usb 2-2: reset high speed USB device using ehci_hcd and address 22
[13082.931139] usb 2-2: device not accepting address 22, error -110
[13083.043129] usb 2-2: reset high speed USB device using ehci_hcd and address 22
[13093.447038] usb 2-2: device not accepting address 22, error -110
[13093.447475] usb 2-2: USB disconnect, address 22
[13093.447897] sd 9:0:0:0: Device offlined - not ready after error recovery
[13093.448442] sd 9:0:0:0: [sdf] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK,SUGGEST_OK
[13093.448450] end_request: I/O error, dev sdf, sector 8217847
[13093.450457] printk: 1517 messages suppressed.
[13093.450463] Buffer I/O error on device sdf1, logical block 8305224
[13093.450469] lost page write due to I/O error on sdf1
[13093.450475] Buffer I/O error on device sdf1, logical block 8305225
[13093.450479] lost page write due to I/O error on sdf1
[13093.450484] Buffer I/O error on device sdf1, logical block 8305226
[13093.450488] lost page write due to I/O error on sdf1
[13093.450492] Buffer I/O error on device sdf1, logical block 8305227
[13093.450496] lost page write due to I/O error on sdf1
[13093.450501] Buffer I/O error on device sdf1, logical block 8305228
[13093.450505] lost page write due to I/O error on sdf1
[13093.450509] Buffer I/O error on device sdf1, logical block 8305229
[13093.450513] lost page write due to I/O error on sdf1
[13093.450517] Buffer I/O error on device sdf1, logical block 8305230
[13093.450521] lost page write due to I/O error on sdf1
[13093.450526] Buffer I/O error on device sdf1, logical block 8305231
[13093.450529] lost page write due to I/O error on sdf1
[13093.450536] Buffer I/O error on device sdf1, logical block 8305232
[13093.450540] lost page write due to I/O error on sdf1
[13093.450544] Buffer I/O error on device sdf1, logical block 8305233
[13093.450548] lost page write due to I/O error on sdf1
[13093.450989] sd 9:0:0:0: [sdf] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK,SUGGEST_OK
[13093.450996] end_request: I/O error, dev sdf, sector 8218087
[13093.459620] sd 9:0:0:0: [sdf] READ CAPACITY failed
[13093.459630] sd 9:0:0:0: [sdf] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK,SUGGEST_OK
[13093.459637] sd 9:0:0:0: [sdf] Sense not available.
[13093.459656] sd 9:0:0:0: [sdf] Write Protect is off
[13093.459660] sd 9:0:0:0: [sdf] Mode Sense: 00 00 00 00
[13093.459664] sd 9:0:0:0: [sdf] Assuming drive cache: write through
[13093.459789] sd 9:0:0:0: [sdf] READ CAPACITY failed
[13093.459793] sd 9:0:0:0: [sdf] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK,SUGGEST_OK
[13093.459798] sd 9:0:0:0: [sdf] Sense not available.
[13093.459811] sd 9:0:0:0: [sdf] Write Protect is off
[13093.459815] sd 9:0:0:0: [sdf] Mode Sense: 00 00 00 00
[13093.459818] sd 9:0:0:0: [sdf] Assuming drive cache: write through
[13093.495908] FAT: unable to read inode block for updating (i_pos 511121)
[13093.518863] FAT: FAT read failed (blocknr 8143)
[13093.518918] FAT: FAT read failed (blocknr 8026)
[13093.622996] usb 2-2: new high speed USB device using ehci_hcd and address 23
[ 6548.475361] usb 2-2: device descriptor read/64, error -110
[13125.877929] FAT: unable to read inode block for updating (i_pos 511121)
[13126.025809] usb 2-2: device descriptor read/64, error -110
[13126.241719] usb 2-2: new high speed USB device using ehci_hcd and address 24
[13142.405157] usb 2-2: device descriptor read/64, error -110