Dear Julia,
You are not being thicker than the average Joe, I too cannot post pictures via the URL method, stangely the more convenient 'browse my computer' function is available in the 'Members aquarium & fish pics' forum so I suggest you post your pics there and refer board members to them. Rather than taking all day dicking about with the likes of photobucket.
With respect to the administrators this seems to be a common and unnecessary problem that could be rectified and has been pointed out before.
Spatial