First, just a quick note for Andrew and Georg, PanotourMaps plugin is a "Kolor made" plugin for krpano viewer. So your link to krpano's forum on an OpenStreetMap thread is not relevant.
On the OSM problem, could you tell me "where" is localized your map ? At which coordinates ? And did you clicked on the "Set as default view" icon on the PanotourMaps hotspot editor view ? If yes, what kind of map was seen when you did it ? Satellite, Street map, or terrain ?
Could you also write here the full XML description of your PanotourMaps plugin in the main XML of your tour ? It is the line describing the plugina named "panotourmaps". It starts like the following :
I do not have any problem displaying this street with OSM. Did you set a default zoom level for the map by clicking on "Set as default view" icon in the "hotspots editor" window for the PanotourMaps plugin ?
Maybe your zoom level is too high (or too low) for OSM.