Partition troubles in Gentoo after Fedora Core 3 installation

[romildo at uber.com.br]

Hello.

I have a mutiboot computer with the options to boot into
	- Gentoo Linux
	- Fedora Core
	- Windows XP
	- Windows ME

My first hard disk (hda) is partitioned as shown by fdisk:

  # fdisk -l /dev/hda

  Disk /dev/hda: 80.0 GB, 80026361856 bytes
  255 heads, 63 sectors/track, 9729 cylinders
  Units = cylinders of 16065 * 512 = 8225280 bytes

     Device Boot      Start         End      Blocks   Id  System
  /dev/hda1               1        1530    12289693+   7  HPFS/NTFS
  /dev/hda2   *        1531        3476    15631245   83  Linux
  /dev/hda3            3477        4206     5863725   83  Linux
  /dev/hda4            4207        9729    44363497+   5  Extended
  /dev/hda5            4207        4269      506016   82  Linux swap / Solaris
  /dev/hda6            4270        9729    43857418+  83  Linux

Recently I have upgraded from Fedora Core 2 to Fedora Core 3
and since then I have been having problems with the /dev/hda6
partition when booting Gentoo Linux. I get the following
message:
  fsck could not correct all errors, manual repair needed
This is happening every time I boot into Gentoo Linux.

The latest version of parted, running in Gentoo Linux, gives me:

  (parted) print
  Disk geometry for /dev/ide/host0/bus0/target0/lun0/disc: 0.000-76319.085 megabytes
  Disk label type: msdos
  Minor    Start       End     Type      Filesystem  Flags
  1          0.031  12001.684  primary   ntfs
  2      12001.685  27266.572  primary   ext3        boot
  3      27266.572  32992.866  primary   reiserfs
  4      32992.866  76316.594  extended
  5      32992.897  33487.053  logical   linux-swap
  6      33487.084  76316.594  logical   ext3
  (parted) print 6
  Error: Filesystem was not cleanly unmounted!  You should e2fsck.  Modifying an
  unclean filesystem could cause severe corruption.
  Ignore/Cancel? ignore
  No Implementation: This ext2 filesystem has a rather strange layout!  Parted
  can't resize this (yet).

The partition has already been checked and corrected by fsck
when booting into Gentoo Linux.

Any help?

Romildo