General :: Apps Missing Using Apps2SD?

I have just installed CyanogenMod 7 on my HTC Desire.

I partitioned my 16GB Class 10 MicroSD card into a 14GB FAT32 partition and a 2GB ext3 partition. I installed DarkTremor's apps2sd scripts, and the apps2sd gui. I set it to save apps to the SD card, and to move the dalvik cache to the SD card.

Everything was working well: I was able to install apps, and they were going to the SD card (had they not, I would have hit the limit of the Desire's internal storage!). Rebooting didn't negatively affect anything - I rebooted several times and the apps were still there.

Then, when I opened the Theme Explorer, the phone just hung. It didn't respond to any input, from the touch screen to pressing or long pressing the power button. Eventually, in desperation, I took the battery out to do a hard reset.

When the phone booted back up, all the apps I had just installed were gone. Their icons remained on the homepage, but with the generic Android icon instead of their actual icon. They were missing from the ADWLauncher panel. The apps are still present in the list of apps, but are missing their icons and proper names. Instead they are displayed with a generic Android icon, and their "long-form" name, for example "com.amazon.kindle".

In addition to all the apps I had installed being missing, certain apps that came with CyanogenMod were also missing, such as: ROM Manager and the program that lists the apps with root permissions (I forget the name). Also, the Market application is missing. However, the calendar, messages, Google Talk, Theme Chooser, etc are all still present and working.

I tried rebooting the phone multiple times, as well as unmounting and remounting the SD card, with no improvement.

Using the terminal emulator, I can see that /sd-ext still has five directories: app, app-private, dalvik-cache, data, lost+found. However, all these directories, including the /sd-ext/app directory, are empty.

Running a2sd reinstall goes through the list of apps, but for each app that is missing, it says that it cannot find the .apk file for that app.

I suppose, then, that I have two questions:

1. Can I restore my apps somehow?

2. If not, and I have to reinstall, how can I prevent this from happening again?