Rsolution de bugs divers.

Fixed memory overwrite/corruption triggered by race condition when multiple instances of FlashFXP are writing to the same data file at the exact same time.
When folder caching was disabled the "request file size/date prior to transfer" option was being ignored and the size/date was always requested when the list command was LIST or STAT -L but not MLSD.
It was reported by a tester that there are some unusual results when a site to site transfer fails and FlashFXP attempts to abort the transfer. I am desperately seeking more information from all beta testers regarding this issue, so please let me know if you experience this issue, along with a copy of the FTP session log. Thank you.