**System Information**
Windows 7 professional, ATI Radeon 3000
**Blender Version**
Broken: Blender 2.69 r60995 (works neither in 2.68)
**Short description of error**
Vertex group to influence the particle size / length not working
**Exact steps for others to reproduce the error**
1. I created an icosphere and a cylinder.
2. I sized down the cylinder and applied rotation and size. It should act as particle. The origin of the cylinder is the center of the bottom circle.
3. Then I weight painted the upper part of the icosphere with value 1 the rest keeps at zero, vertex group is standard called 'Group'.
4. I added a particlesystem type emitter to the icosphere, under 'Render' I selected 'Object' and entered my cylinder as particle.
5. Under 'vertex groups' I choosed 'Length' and picked 'Group' as vertex group which should influence the size (called length) of the particles.
Immediately all particles rotate to the right (see Particle_Size1.jpg)
If I hit tab to enter edit mode and tab again to enter object mode again, the particles switch to their original position (see Particle_Size2.jpg) but the vertex group does not effect the size. All particles still have same size.
If I hit 'Negativ' (on the right side of vertex group setting for 'Length') then all particles rotate to the right again.
If I hit tab and tab again, they rotate back but no influence on the size / length.
Another weird thing:
If I switch the 'Negativ' box to enabled or dispabled and immediately after that I open the 'Display' option of the particlesystem settings and move the slider from 100% down to 0% and back to 100% sometimes a few particles keep out of the sphere see (Particle_Size3.jpg). It seems that there are some problems inside particle system?
Same happens in Blender 2.68.
This happens also to other vertex groups settings like Clump, Kink. Density seems to be working.
Blendfile is attached.
{F46352}
{F46356}
{F46358}
{F46360}