This isn't a bug specific to the beta as it exists in v4 final, but it's a bug ...
Enable listings via 'STAT -l' option now go manually enter the command 'LIST -al hail all' it will turn into 'STAT -al hai a'. If you don't specify the -al it will turn into 'STAT -l hai a'. Looks like all 'l's are being removed from the string. I think parsing the formal '-options' makes a lot of sense which is why the -a argument crosses over, but it shouldn't do anything to the string if the first arguments doesn't start with a - and then it shouldn't go beyond the first argument...
Was sort of funny, I couldn't figure out why my search wasn't working until I noticed what I typed and what was being searched for weren't the same