Good morning….unfortunately I do not see an attachment to this post, perhaps try once again. I think it didn’t get added because your file extension might have been an uppercase PNG (I just added this to allowed file types). When you say black pixels, are you referring to the menu and the few items that have a small downward arrow to the right? IF so, this is the menu plugin you are using which puts that in to show the visitor there is a submenu on that parent menu item.
Thanks for the screenshot…worked this time 🙂
Anyway, the slideshow issue…I think this could be partially related to the plugin, but hard to say. Try this though because I just did this to the live demo site…make your width 100% and height as auto in the slideshow settings.
By the way, that photo of the snowy trees reminds me of where I used to go skiing and snowmobiling as a kid. Great photo!