These files I used to find here
/private/var/tmp/folders.501/TemporaryItems/FlashTmp0
/private/var/tmp/folders.501/TemporaryItems/FlashTmp1
but this folder has ceased to exist .. o_O
OK, some tedious searching has found the temp file(s) at
/private/var/folders/2E/2EFZQa0NGbKgDAbyRFtrdk+++TI/TemporaryItems
My system is now on Snow Leopard which may contribute to this change but I was sure it was at the earlier location very recently.
I *did* do some apt-get installs yesterday ... [shrug]