[Gmsh] Strange differences between Gmsh 2.2.3 and 2.2.4

[Moritz Nadler]

I made a .geo file with gmsh 2.2.3 until it produced a mesh a approximately 
representing what I had in mind. But when I used the same geo file with gmsh 
2.2.4 I got a totally different mesh ( well the geometry remains the same but 
the mesh density globally and locally different. See these gmsh terminal output 
for a first idea.

Both versions were compiled from source with GCC.


Gmsh version 2.2.3

gmsh -rand 1.e-8 circle2.geo -2
Info    : 'gmsh -rand 1.e-8 circle2.geo -2' started on Thu Sep 25 19:02:26 2008
Info    : Reading 'circle2.geo'
Info    : Read 'circle2.geo'
Info    : Meshing 1D...
Info    : Meshing curve 1 (Line)
Info    : Meshing curve 2 (Line)
Info    : Meshing curve 3 (Line)
Info    : Meshing curve 4 (Line)
Info    : Meshing curve 5 (Line)
Info    : Meshing curve 6 (Line)
Info    : Meshing curve 7 (Line)
Info    : Meshing curve 8 (Line)
Info    : Meshing curve 9 (Line)
Info    : Meshing curve 10 (Line)
Info    : Meshing curve 11 (Line)
Info    : Meshing curve 12 (Line)
Info    : Meshing curve 13 (Line)
Info    : Meshing curve 14 (Line)
Info    : Meshing curve 15 (Line)
Info    : Meshing curve 16 (Line)
Info    : Meshing curve 100 (Circle)
Info    : Meshing curve 200 (Circle)
Info    : Mesh 1D complete (0.504031 s)
Info    : Mesh
Info    : Meshing 2D...
Info    : Meshing surface 106 (Plane, MeshAdapt+Delaunay)
Info    : Mesh 2D complete (65.8241 s)
Info    : Mesh
Info    : 107605 vertices 215214 elements
Info    : Writing 'circle2.msh'
Info    : Wrote 'circle2.msh'


Gmsh version 2.2.4:

gmsh -rand 1e-8 circle2.geo -2
Info    : Reading 'circle2.geo'
Info    : Read 'circle2.geo'
Info    : Meshing 1D...
Info    : Meshing curve 1 (Line)
Info    : Meshing curve 2 (Line)
Info    : Meshing curve 3 (Line)
Info    : Meshing curve 4 (Line)
Info    : Meshing curve 5 (Line)
Info    : Meshing curve 6 (Line)
Info    : Meshing curve 7 (Line)
Info    : Meshing curve 8 (Line)
Info    : Meshing curve 9 (Line)
Info    : Meshing curve 10 (Line)
Info    : Meshing curve 11 (Line)
Info    : Meshing curve 12 (Line)
Info    : Meshing curve 13 (Line)
Info    : Meshing curve 14 (Line)
Info    : Meshing curve 15 (Line)
Info    : Meshing curve 16 (Line)
Info    : Meshing curve 100 (Circle)
Info    : Meshing curve 200 (Circle)
Info    : Mesh 1D complete (0.43 s)
Info    : Mesh
Info    : Meshing 2D...
Info    : Meshing surface 106 (Plane, MeshAdapt+Delaunay)
Info    : Mesh 2D complete (365.69 s)
Info    : Mesh
Info    : 750256 vertices 1500535 elements
Info    : Writing 'circle2.msh'
Info    : Wrote 'circle2.msh'


My questions are:
Can somebody tell me the reason for this?
Did the syntax change so that what I was using is not longer valid in 2.2.4?
Is there a Bug responsible for this. And if in which version?

Can somebody reproduce my findings ( I attached the .geo file )?
Or must be something wrong with my installation. ( although I could reproduce 
this already on 2 machines).


kind regards


Moritz
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