This is very likely a duplicate of bug #110138. Can you tell me something about the partition? Was there originally an NTFS partition on it, by any chance (or some other filesystem located at that location)?
Also, when was the filesystem (with the problem) originally mke2fs'ed? There was bug in very old versions of mke2fs where it didn't zap the boot sector of the filesystem, which meant that an old NTFS filesystem signature could end up confusing the blkid/findfs programs. This would explain the symptoms that you reported.
This is very likely a duplicate of bug #110138. Can you tell me something about the partition? Was there originally an NTFS partition on it, by any chance (or some other filesystem located at that location)?
Also, when was the filesystem (with the problem) originally mke2fs'ed? There was bug in very old versions of mke2fs where it didn't zap the boot sector of the filesystem, which meant that an old NTFS filesystem signature could end up confusing the blkid/findfs programs. This would explain the symptoms that you reported.