I raised some of the problems relating to making an Avast USB rescue drive on Ticket #LSI-274-95323 back on 12th of November. After some further correspondance where I it was elevated to Level 2 on 19th November and subsequently sent to developers on 22nd November. on 25th November I pointed out that Avast was not properly writing some of the first 512 bytes on the drive, and the results varied depending on what format was placed on the drive prior to the Avast process.

I have heard nothing since. I assume it is still with the developers.