Looking at my keychain I see I have three logins for alioth... draegtun, draegtun-guest & draegtun_guest... all created on 1st Jan 2010.

So it looks like I had issues logging (back) onto Alioth at that time :(

Anyway resolved it now because I see that draegtun-guest does work for me :)

It's a little convoluted and the contribute notes don't initially match what you see at login but after rummaging around I found the required tracker and have now submitted the faster fasta.pl.