I had one crash today on 10.6.1, but the problem that is emerging it that FL is behaving very slowly when I am working with multiple fonts. I was finishing a font family of 24 fonts and having all open and "Generate All" took several minutes to complete, but the "Save All" was the real bust. It took quite a while, and it never was clear that the program had finished the work. These same two functions were accomplished in a few seconds on the XP Windows side.
The crashes may be less, but the performance with multiple fonts open is seriously impaired!
In my trivial and brief experience, running FLS on Mac OS X is a disaster, it really is a complete dog of an application ...keep well away, this thing is toxic. I decided to run a WinXP (highly modified ultra lite version) inside a VMWare Fusion Virtual Machine, man this loads WinXP faster than my Mac can launch FL!!! Running FL in WinXP is actually a very pleasant experience. It behaves quite nicely and is very very fast. Unfortunately there are a few annoying caveats :
1: The font window always defaults to Microsoft char set when I want it Mac OS Roman
2: No Generate Mac Suitecase
3: No ability to open TTC or generate a TTC
4: The encapsulating window design...very bad design as it makes working with dual monitors with different resolutions well ... extremely difficult. Also the title bar of font and glyph windows can (idiotically) slide under the toolbar an the encapsulating window holding the menubar.
5: Never remembers a previously resized glyph window, and it would be a great if each glyph had it's own properties panel to compare glyph properties.