AHA! Ok, that makes sense... presumably also why post-scandisk it works.
Do you know if you have to do a FULL format each time? I will if necessary but boy... it's a pain!! I have deleted files from the unit via the computer before and not faced this problem, but since others are having exactly similar issues, it seems clear there's something going on... Does it only happen when moving rockbox files from teh recordings directory? I still record mp3s for non-performance stuff, and thus use iriver firmware for those - have never had a problem when moving/deleting.
All further info welcomed
In the meantime... anything I need to know about formatting? Have never actually done one (yikes!) - presumably it wipes everything so I need to move all data files to somehwere else. And then do I have to reinstall iriver and rockbox firmware? Are there instructions on this somewhere somebody can point me to (is it in the handy-dandy iriver faq that's being developed?)