Binflash has just been updated to version 1.25
Everyone with a 3550, 3551, 4550, 4551, 6750, 6751, 7550 or 7551 drive should NOT flash with one of the previous versions. There was a severe bug in 1.24 that could lead to broken drives on some hardware configurations.
As a small excuse 64 bit Windows executables have been added now – untested though.
[EDIT]Removed 64 Bit versions again. Didn’t work :([/EDIT]
[EDIT2]Working 64 Bit versions available now :)[/EDIT2]