concert pitch problem

hi,

Musescore 0692. Windows XP Pro.

Create a score with flute in E, Bb clarinet in F# and Eb Clarinet in C#.
Press concert key. Press concert key again to get back. Now the transposed instruments change to Gb and Db.
I guess it is because Musescore always use b when transposing down. But in this case it should not.
I guess the problem will be there in a couple of other keys with many accidentals.

regards
ph