TDBNavigator bug?

[gnajar]

Hi,
I'm playing a bit with basic db applications in Lazarus; I'm using PostgreSQL v0 on WinXP, so I used a TPQConnection, TSQLTransaction, TSQLQuery and TDataSource linked to a TdbGrid.
In design time, I can see how data is rtrieved ok, yet its new for me (I'm comming from Delphi 6 using dbExpress) that its mandatory to link a TSQLTransaction to the rest of db COmponents.
Then, on the window, I positioned a new DBNavigator; when selecting it with the mouse just to have its properties shown in the properties palette, I get: "List index (6) out of bounds; either pressing Ok or Cancel, all  Lazarus crashes.
Any patch to this problem?

Thanx,
Guillermo