Copy selection buggy ... is that new or old?

Hi, I just noticed that if you create, say, a 0.5x0.5x10.0 cylinder and try to put another one on top of it with copy selection and center copy, the upper cylinder doesn't align properly ... it is visibly off-center and there's a gap between the 2 cylinders.

The deviations seem to be more pronounced the higher the cylinders are. I couldn't see them at all with 0.5m high ones, at 5m they were clearly visible, at 10m very conspicuous.

My question: Is that bug new or old? Should I put in a jira entry or is there already one I can vote for? Thanks!

I can duplicate that here and I think it is an existing bug.

http://jira.secondlife.com/browse/SVC-1178

In there, Andrew Linden notes near the bottom of the comments that it might not be fixable in all cases, that it might take a rewrite of the whole copy selection thing to happen on the viewer instead of the server.

But Simon also comments that if there are other manifestations, to open a new issue.

Also http://jira.secondlife.com/browse/VWR-6322 looks like the same problem you found, but it should probably be a SVC bug.

Gaps between prims on a grid usually are the result of some accidental prim-rotation or the wrong grid/prim size.
Opengl will always show up-to-1-pixel-wide gaps between 2 objects due to inaccurate z-buffering.