Hello,

First of all Jmol is an amazing program and I am extremely impressed by 
its rapid growth since I started using it about two moth ago. I have 
difficult time keeping up with the updates. Kudos to the developers!


I have just replaced version 11.8 with 12.08. Since I am still very new 
to Jmol some of the questions or comments are most likely due to my 
ignorance, but here they go:

1. It looks like in contour plots (or equivalent color-filled 
projections) hovering above contour line or a color border does not 
display the values associated with that line. It did in 11.8 version.

2. The isosurface (mostly orbitals) calculations seem slower with 12.08 
than with 11.8. I did not do any quantitative comparison, but that is my 
impression upon checking on several different computers.

3. Display results differ (slightly) between versions. For example:


  isosurface estrans2 cutoff 0.09 phase color darkred darkblue color 
translucent atomicOrbital 2 0 0 1.0; isosurface escross2s color absolute 
-0.2 0.40 plane xy resolution 6 atomicOrbital 2 0 0 1.0


gives somewhat different relative sizes of the contour (colored 
cross-section) and orbital boundary.  BTW: Is there a way to plot 
contour or color-filled-projections of electron density rather than the 
wavefunction?

4. 12.08 has difficulty in displaying jvxl file written by 11.8. It does 
it very slowly (several minutes) and --after finally loading -- the 
model cannot be interacted with.  I have encountered only one example of 
this difficulty, and the jvxl file re-written with 12.08 Jmol works 
fine.  Could this have anything to do with the changes in the spartan 
file reader? (my jvxl files are based on smol spartan files)

I had to add noOrient filter for several of my other structres to 
recover the previous model orientation. BTW: a suggestion: perhaps the 
listings of new features in the new versions (such as this one: 
http://chemapps.stolaf.edu/jmol/docs/examples-12/new12.htm) should 
separately highlight changes that result in different behavior in the 
new version. It would help (at lest novices like me) to make adjustment 
when changing to a new version.

Thank you again for your work on Jmol and your help in learning how ti 
use it.

PM


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