undefined/not implemented MI command causes gdb crash (windows/linux)

Hi, I have annoying problem with gdb6.6/6.7. I run 'gdb -i
mi', and type 
'dummy' (is not defined) alternately with '-target-attach'
(is not 
implemented). I get gdb crash each time (with others not
defined/not 
implemented commands too). Can you reproduce this problem?

Regards
Bogdan

PS. I tried gdb6.3 - it's ok.