I was having a go at making a Monorail layout, but struggling a bit to get odd connections (point->point, small curve->small curve) to line up. Had a poke around in the XML files, and it appears the point geometry's wrong.
The XML files are written on the assumption that the 45-degree connections lie at 45-degree point on a 28-stud circle (and hence have non-whole-stud positions) but they don't. The 3 connections on the points should be at (0,0), (32,0) and (20,8) studs. (This makes monorail layout a lot easier than normal track layout).
I've twiddled the XML files to correct this, and they all connect properly now. Unfortunately, the GIFs don't line up at all well, so it doesn't look pretty - they weren't brilliant before, and now they're even worse. They need their drawings corrected, and I don't fancy attempting that. I think it would help if all the track GIFs were a whole number of studs in size (multiple of 8 pixels). I have a feeling part of the problem is that the program's maths get some rounding errors when dealing with odd-sized GIFs, and the resulting ".5625" stuff in the XML.
Example for 2889.7.xml (with current GIF):