krex, when you say 'saving a recording' do you refer to a file which you just created in WavePad using the 'Record" function, or are you referring to an already existing file that you loaded into the program?
I only ask because this topic/complaint regarding MP3 behavior in WavePad has come up in the past, and one I like to follow along and experiment with in my own scenarios. I nominally work with .wav files, and use another program to convert file formats, but do regularly export mp3s from wavepad. I haven’t experienced the <loss of data when saving as mp3> syndrome
So I’ve never had cause to delete the WavePad cache – but perhaps that’s because I run my Norton utilities regularly. I don’t know. I’m using version 5.1 on a win7 machine…..