[OpenLayers-Users] PopUp only show when one theme will show

[Jan Tappenbeck]

Hi !

i have a little map for poi about communication (postbox (called 
postkasten), telephone, postoffice etc.).

for the blue post_boxes-icons there are information in a popup about 
collection_times. this popup's only will show when the post_box-layer is 
active standalone (firefox 3.5).

can anybody tell me the reason why - and a alternative ???

regards Jan :-)