Custom Proximity Sounds Stopped working on Nuvi 350

Ok, this is a weird one for you guys. I have all the poi's working and everything is great for months. Then, I download the latest redlight and speed camera files, put them in my POI folder on my PC, run the POI Loader and install the new POIs in my Garmin Nuvi 350, but now I get the default beeps and bongs for proximity alerts and my custom mp3 files have stopped playing.

I tried using a different SD card to transfer the data, but that did not work. I tried using a different computer with the POI loader, but that did not make a difference, either. I tried hooking the GPS up to the PC directly and using POI Loader to load the data without the SD card, also to no avail.

I renamed the mp3 files by copying and pasting the names of the speed and redlight camera filenames and just changed the extension to .mp3 and still made no difference.

I found an old SD card with my previous poi.gpi file and I copied that manually on to the Nuvi and my custom audio proximity alerts started working again.

I pulled just the redlight and speed camera files along with the accompanying mp3 files and tried to load just those, but that did not make a difference either.

I downloaded and installed the latest version of the POI loader software (2.4.2) and updated to the latest firmware (5.20) and still no difference.

So, I've edited this message now three times as I keep trying different things. I finally found the previous version of POI Loader (2.4.1) and it seems to have solved the problem. It also offers the option to IGNORE THIS FILE, which is nice when I have my directory full of POI files, I can select to ignore individual files without having to remove them from the directory. It seems there is a problem with importing the custom audio alerts in version 2.4.2. Should I report this to Garmin? Is anyone else experiencing this?

Thanks,
Carey