I have a question for you. I'm using fontlab 5.1 and i have some problem on unicode name for the letter /Delta and /Increment: the unicode of /Delta has to be 0394 but fontlab assign automatically (in the properties windows) the code 2206 that was actually the code for /increment. Anyone can help me?
Another conflict to look out for is Greek lowercase mu, and and the microsign µ, which is named "mu" due to legacy reasons. They may need different designs.
Those aren't the math symbols, those are the Greek alphabetic codepoints.
Personally, I tend to just double-encode. I also manually override the FL default unicode assignment when working in Font Lab.
Be aware that the AGLFN (Adobe Glyph List For New Fonts) still associates Delta with u+2206 for legacy reasons. It’s not just a Font Lab thing.
You can manually override this in FontLab Studio (or FontLab VI) if you like, but for various dumb technical reasons, it is slightly safer to use the /uni names for the Greek lowercase mu and cap Delta. The symbols can pretty safely have either the Greek names or the /uni names.
So, that is why FontLab has the defaults it does. Sigh.