Hello,
I had a working XAMPP installation. I just applied the 1.6.8 -> 1.70 update, then the 1.70 -> 1.71 update.
Now my apache installation is broken. Clicking Start from the XAMPP control panel gives "Apache service started" in the info box, but it doesn't appear to actually run. I'm thinking I need to reinstall everything, but then I have to get the srvany/Mercury thing and the apache virtual hosts and mysql DB running again from the backup I made and...