Stefan, I've asked Cheetos to bring this to your attention, but I might as well post it here too.
I've made a few changes/fixes to the pics1.png over time...
Here's the thread (I'll attach the most recent version here as well)
I was hoping you could include this in the following Graal updates and make it the default pics1.png download. There are just some pixel errors that are fixed, some inconsistencies (Some tiles still used the old tree parts). I also fixed the transparency issue that I had with the gravestone tiles (Showing black where there should've been grey when playing Graal) so hopefully that won't cause anybody problems with this tileset.