Well, I may be wrong, Nym, but I think that when people experience this bug when saving their work for the first time, it's more likely that they actually loose nothing precious. I mean, if you've just bought MPC, you won't expect your first beat to be the top of the pops, so to speak, will you? Ok, that might seem cynical but still.
And I am sure that after getting to know the MPC and its features, after using it for, say, half a year, it is quite unusual not to know the bugs and not be aware of certain consequences of triggering them. You know, an MPC user can say he/she wasn't aware of the saving bug only if he/she's been living in an isolated island with no internet connection available for the past couple of years

All right, I'd recommend another workaround for saving-bug-troubled minds. Do all people know that it is possible to save sequences as a Standard MIDI File (SMF)? Well, it is actually. So, as we know, the saving bug **** up sequences, not programs and samples. Ok, the wise thing to do before saving an entire memory in a new folder

(which can possibly lead to loosing data), will be saving your sequence as a MIDI file. As far as I understand from Da Manual and other independent sources, an SMF file merges all MIDI data from the sequence to one track (I am not sure about that, though, I have to check it out). Hence, it would be a good idea to make a copy of a sequence and then save each track of it one by one as MIDI file (by deleting all tracks but one, saving a MIDI file, then creating a new copy of sequence, deleting all tracks but one... and so on). It could be tedious, yes, but you won't loose MIDI info (which is actually what matters most, when saving) if a saving bug screws everything up. And there's one advantage to this technique. After exporting all parts of the sequence as MIDI files, you can then import them into any DAW or MIDI sequencing hardware for further editing!!!