Comment 2 for bug 507493

I experience similar problem with 10.10 release (and with release candidate, too). My existing ext4 partition is recognized, but when I try to open it (from places or in Nautilus) it just disappears (from both Places and Nautilus). It comes back there after I umount it.

Here's what I see in syslog/messages/kernel:
Oct 10 13:54:05 ubuntu kernel: [ 1629.519655] EXT4-fs (sda2): warning: maximal mount count reached, running e2fsck is recommended

uname -a:
Linux ubuntu 2.6.35-22-generic #33-Ubuntu SMP Sun Sep 19 20:34:50 UTC 2010 i686 GNU/Linux

I boot 10.10 release from USB flash created with usb creator.

When I boot back to 10.04 installed on the PC, the same partition works OK.

I'm just not sure if it's safe to install 10.10.