I cannot save a semilog (x axis) scatter plot as a postscript file. I have tried as many backends as I can think of. I can save PNG fine, just not a PDF or a PS.
Here is some sample code that doesn't work. I did this test in ipython, so no imports or anything like that.
x = randn(1000)
y = randn(1000)
Then save the ps. I just used the interactive window to save it. Try to open the ps and it fails.
Next I tried
Still no dice...