suggested work around for opfire bug

[Gibratar]

Hi,
I'm reporting a problem with the filter in Basic security
If you set the filter for units it shows that it has been set. However when your turn is returned from the other player, the filter has been cleared. I'm using Windows XP. I asked the opposing player to test it and he reported the same.
I've just done some tests with a "PBEM" to myself. The filter is removed but if the range is set, it is still set on subsequent turns.