First of all there is a problem with the way it saves the fonts. They don't work in all applications.
Seccond, the major bug:
This is when working with 3D graphs.
Maple 10 saves the curves in a graph as a bunch of small lines. The problem is that each of these lines are saved several times, one after the other. Usually there will be 8 identical copies of each line saves, some going the opposite direction, but still the same line. Sometimes it will also consist of lines with no length at the endpoints.
This way it can sometimes save a hundred (100) objects, for just one line, where each object is either just the exact same line, or a line with no length at one of the endpoints.