Column with name "Extra" not found - Vista?

[mdec]

Hi all,
I have met situation described below, everything with D7.

While using Zeos 6.5 or 6.6 on machine with MySQL 5.1.30 and 5.1.40 everything works very good (Win XP)

Another versions of MySQL which I have installed are 5.1.36 and 5.1.40, on Vista with ZeosLib 6.5 or 6.6. Same mysqllib.dll as in XP.
DLL is copied to application folder to be sure that this one is in use.

In this case I have message: "Column with name "Extra" not found"...
I was tracing sources a bit, and I have identified that during table structure checking (types of fields) Zeos looks for such column which doesn't exists.

Any ideas?
Thank you all in advance.

Mariusz