repeatable crash

1.run guery on single table
2.edit field value, do not click inside grid to save
3.click run query button
--> crash

date/time : 2012-03-07, 12:07:03, 368ms
computer name : PC-PC
user name : PC <admin>
registered owner : Microsoft / Microsoft
operating system : Windows 7 x64 Service Pack 1 build 7601
system language : Slovenian
system up time : 2 days 19 hours
program up time : 2 minutes 39 seconds
processors : 8x Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz
physical memory : 3918/8099 MB (free/total)
free disk space : (C:) 33,71 GB
display mode : 1920x1080, 32 bit
process id : $10d4
allocated memory : 51,48 MB
executable : heidisql.exe
exec. date/time : 2012-02-17 06:17
version : 7.0.0.4058
compiled with : Delphi XE
madExcept version : 3.0m beta 1
callstack crc : $ec11d57a, $b5c46917, $b5c46917
exception number : 2
exception class : EAccessViolation
exception message : Access violation at address 0071B564 in module 'heidisql.exe'. Read of address 00000050.

main thread ($1b40):
0071b564 heidisql.exe dbconnection 3565 +0 TDBQuery.ColumnCount
007e0396 heidisql.exe Main 7319 +6 TMainForm.AnyGridGetText
0063a098 heidisql.exe VirtualTrees TCustomVirtualStringTree.DoGetText
00639448 heidisql.exe VirtualTrees TCustomVirtualStringTree.GetText
0063a02b heidisql.exe VirtualTrees TCustomVirtualStringTree.DoGetNodeWidth
00624e9c heidisql.exe VirtualTrees TBaseVirtualTree.DetermineHitPositionLTR
00631ba9 heidisql.exe VirtualTrees TBaseVirtualTree.GetHitTestInfoAt
0040b0f1 heidisql.exe System 548 +0 @IntfCopy
00629727 heidisql.exe VirtualTrees TBaseVirtualTree.HandleHotTrack
0062c161 heidisql.exe VirtualTrees TBaseVirtualTree.MouseMove
004e95e2 heidisql.exe Controls TControl.WMMouseMove
004e8cbc heidisql.exe Controls TControl.WndProc
004ed580 heidisql.exe Controls TWinControl.WndProc
0062eec8 heidisql.exe VirtualTrees TBaseVirtualTree.WndProc
004ecc20 heidisql.exe Controls TWinControl.MainWndProc
004ab4d8 heidisql.exe Classes StdWndProc
74f37885 USER32.dll DispatchMessageW
00575b6b heidisql.exe Forms TApplication.ProcessMessage
00575bae heidisql.exe Forms TApplication.HandleMessage
00575ed9 heidisql.exe Forms TApplication.Run
007f98fb heidisql.exe heidisql 67 +16 initialization
758233c8 kernel32.dll BaseThreadInitThunk