data filter tab- crash when removing column from sorting

Hi,

My data was sorted according to 2 columns. When pressing on x next to one column in the Sorting drop down i got

date/time : 2011-03-13, 11:25:19, 172ms
operating system : Windows XP Service Pack 3 build 2600
system language : English
system up time : 3 days 19 hours
program up time : 1 hour 42 minutes
processors : 2x Intel(R) Pentium(R) 4 CPU 3.00GHz
physical memory : 1650/3063 MB (free/total)
free disk space : (C:) 35.07 GB
display mode : 1280x1024, 32 bit
process id : $1384
allocated memory : 20.62 MB
executable : heidisql.exe
exec. date/time : 2011-03-13 09:42
version : 6.0.0.3723
compiled with : Delphi XE
madExcept version : 3.0m beta 1
callstack crc : $c50dc550, $214c4aba, $214c4aba
exception number : 1
exception class : EAccessViolation
exception message : Access violation at address 0053006B in module 'heidisql.exe'. Write of address 0206D800.

main thread ($dbc):
0053006b heidisql.exe ComCtrls .TStatusPanel
004d8c33 heidisql.exe Controls TControl.WMLButtonUp
004d823c heidisql.exe Controls TControl.WndProc
004dcb00 heidisql.exe Controls TWinControl.WndProc
0050fe04 heidisql.exe StdCtrls TButtonControl.WndProc
004dc1a0 heidisql.exe Controls TWinControl.MainWndProc
004a5720 heidisql.exe Classes StdWndProc
7e418a0b USER32.dll DispatchMessageW
005763c3 heidisql.exe Forms TApplication.ProcessMessage
00576406 heidisql.exe Forms TApplication.HandleMessage
00576731 heidisql.exe Forms TApplication.Run
0079774a heidisql.exe heidisql 65 +15 initialization

I use mysql 5.1
Thanks,
David