Hi everybody, this is bizarre, but hear me out: a file that I have has a mixture of xml, TeX and Lua. It compiles cleanly, no problem, on macos and linux. I also have a little raspberry pi on which I have installed lmtx. The file compiles, BUT: it has one additional page. The first page of the document is empty and has the word "on" in the upper left hand corner of the text area. I have checked several times, it always comes out like this. Everything else is exactly the same - context version, file and environment files (everything under git, so really identical). The "on" does not appear if I just make a "hello world" document on the raspi. So my question is: how can I begin to explore where this word creeps in? I suspect it's something in the linux-aarch64 tree or some test for this architecture that is the culprit, but what would be a good way to trace it? All best Thomas