Reinstalled windows in Dutch and the problem is gone. I could not fix it by changing the language settings. Probably my previous windows installation was messed up.

Thank you for your help
Lolke

That's it!
My default language is Dutch but installing windows in English solves the problem. If I want to revert to Dutch what adjustments should I make?

Regards
Lolke

This is a smaller area. The striking thing what I wanted to show is that the visible icons are organised in a pattern. On the north American continent it looks almost mathematical arranged: square blocks  in a spreadsheetpattern. Perhaps it means something, it looks strange doesn't it?.
As I mentioned before: if I put the mousepointer on a place where I know there is a NDB a pop-up shows the right data.
Thank you for looking into this.
If nobody else has this problem perhaps the computer is just to old. Even without the overlay Plan-G is great.

Regards
Lolke

And here is the screenshot

Hello Tim

It affects all of Europe. I will send a screenshot with this post. I have checked directX and have swapped the radeon for a Geforce 4200 and still no improvement. Both cards have legacy drivers but I have installed the latest.

Best regards
Lolke

Hello
Plan-G is great!
I have however a small problem on a Vista computer (athlon 2.4) with a radeon 9550 videocard. (plan-G only, FSX on another computer, simconnect ok) On the Plan-G map not all the VOR's and NDB's show up. Hovering with the mouse over the position of these beacons the textbaloon does appear. So it seems just the display of the icons is incorrect. There are some beacons showing up, these are in clusters on the map as if some parts of the overlay map are suppressed. I have tinkered with the database, the last one I have made on another computer and copyed to the problem computer but the problem is still there.
Any ideas?

Best regards
Lolke