I'm sure there are still a lot of bugs.

Let's cite the most critical :

* When you plot an isosurface (in 3d) on a deformed configuration,
if you change the exageration factor, the iso may fall outside
the outline of the domain.

* [cygwin only] cygwin uses a very strange memory management, and it
has been reported that increasing the memory beyond 64MB (32MB in
some cases) leads to a "segmentation violation" when xd3d is
launched. A cygwin guru is needed to solve this problem, but unfortunately
I'm not one of them...

* When you save a bitmap image (or a sequence of images to make a
movie), it may happen that the result is uncomplete when the xd3d
window is obscured by another window during the saving process.
In this case, do it again being sure that nobody is hidding any part
of the displayed image. (This bug is not due to xd3d but to
a strange interaction between the xpm library and some window managers).

* It may happen that the main window is not properly refreshed for
various reasons. In this case, resize a little bit the window (1
pixel is enough) and it will be redrawn.

* In some cases, in 3d, when the elements are very elongated,
the hidden faces algorithm, which is quick but not perfect, can
show artifacts (a portion of face behind displayed in front of
another one).

* When using mesh files (avoir2D, avoir3D), avoid mixing different
element types. In 2d, P1 triangles and Q1 quadrangles can live together
provided you have put all the triangles *before* the quadrangles in the
element's list. Other combinations can lead to unpredictable results,
especially if you mix P1 or Q1 elements with P2 or Q2 ones.

* Cross sections + symmetries are not working very well :(