Weird (but reproducible) screen display glitch: \[ImaginaryI] appears as just "i"

*To*: mathgroup at smc.vnet.net*Subject*: [mg70560] Weird (but reproducible) screen display glitch: \[ImaginaryI] appears as just "i"*From*: AES <siegman at stanford.edu>*Date*: Thu, 19 Oct 2006 03:23:29 -0400 (EDT)*Organization*: Stanford University

The weird behavior is that when I run the following inputs the "\[ImaginaryI]" character associated with the "I (g/h^2)" in Input[2] displays inside the Sqrt symbol in Output[2] as the expected Mathematica "ii" symbol that looks like two lower case i's squished together under a single dot -- but the same character in the same place (under the radical) in Output[3] appears only as (what sure seems to be) a **single** lower-case "i" -- while the "I k" terms in Input[3] display with the proper \[ImaginaryI] character. In[1]:=x;Remove["Global`*"]; In[2]:=f= Sqrt[1+I (g/h^2)] Out[2]=\!\(\@\(1 + \(\[ImaginaryI]\ g\)\/h\^2\)\) In[3]:=rho=(-f+I k)/(f+I k) Out[3]=\!\(\(\(-\@\(1 + \(\[ImaginaryI]\ g\)\/h\^2\)\) + \[ImaginaryI]\ k\)\/\(\@\(1 \+ \(\[ImaginaryI]\ g\)\/h\^2\) + \[ImaginaryI]\ k\)\) This is at least semi-reproducible: It remained when I copied the offending lines from the place where I had first noticed it (where I was using symbols other than f, g, h) and pasted them into a new notebook. It remained when I re-typed the new example shown here into a fresh notebook. **It goes away if I just use "I g" instead of "I (g/h^2)" in Input[2] -- and comes back when I restore the "/h^2".** It remained after shutting down Mathematica and re-opening it. Oh, and if I use the FrontEnd "Copy Output from Above" menu command just below Output[3], the Input[4] that is created displays properly -- **but if I execute it the Output[4] is again wrong**. A font problem of some sort, maybe? [Mathematica 5.1 on Mac iBook G4, OS 10.3.9]