Hi again,

My system is Windows XP SP3 + Apache 2.2.9, NTFS filesystem and no virtual 
systems involved.

However, I have just reproduced the bug within a clean Virtual Machine 
(VMWare) with Windows XP SP3 (+Net 3.5 SP1) + XAMP v1.7.3 (includes Apache 
2.2.14). This virtual machine is absolutely clean, I mean, no Antivirus, no 
other program appart from:
- Python v2.5.4
- Mercurial v1.4.2 (latest)

I have tested this also only with command line commands (no TortoiseHG) just 
in case. The problem is exactly the same.

This time Mercurial tells me (after an hg verify --verbose on testbug1):

repository uses revlog format 1
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
 data/file2.txt.i@1: missing revlog!
 1: empty or missing file2.txt
 file2.txt@1: 6a9e169d2b12 in manifests not found
2 files, 3 changesets, 1 total revisions
3 integrity errors encountered!
(first damaged changeset appears to be 1)

I have just installed a fresh copy of Windows XP SP3 slipstreamed on a NTFS 
formatted volume, then installed XAMP v1.7.3, then Python v2.5.4, then 
Mercurial v1.4.2 and followed the steps described in the first post.

Hope this helps...