Just a small bug, most likely something relating to Scintilla though.
Anyway, when using Pascal source files, the last "end." does not get syntax-highlighted unless there is a newline just below it. Free Pascal doesn't need a newline at the end of it's source files normally, so I don't normally place one there (and also turn this setting off in the Geany preferences), but it shouldn't really not highlight the last "end." if I miss this newline out, should it?
Also, if I do place a newline after the last "end.", so it syntax highlights, there is another bug where the code folding goes beyond the last end.
Nothing major, just thought I'd mention it.
The screenshot should explain it better than I can, I hope you don't mind attachments on this list, therefore I tried making the file as small in size as possible.