src/lyx on Mac Doesn't Display Math Symbols

[Roger Mc Murtrie]

In testing lyx1.5.0rc1 math block problems on a Mac under OSX 10.4, I  
have found that starting lyx using src/lyx results in math blocks not  
displaying symbols, instead, for example Greek letters display as  
English letters with the Greek character mu displaying as English m.  
However, if I make install and start the resultant LyX,app, this  
problem does not occur.
I wondered if this should be considered a "bug" or is it expected and  
acceptable behavior?

Roger