they probably will, but there's a way around it - pressing bookmark button swaps the doDigit function (saving the old one) to ours and starts the timer. If a number is pressed before the time passes, bookmark v2 is set, doDigit function is restored and the timer is killed. Otherwise the doDigit function is restored and old style bookmark is set.
The real problem (for me at least) is how to actually remember the bookmark
1) get the part of the page as a description (but on the other hand you can enter your own description - soon

)
2) save the bookmark in reader's bookmark database - I have no idea there it is and how to access it from internal javascript...