List,

the value of Preferences compileBlocksAsClosures can have a meaning

- for a single or a group of methods
- for all methods of one or more classes
- for the lifetime of the current session
- forever

It is easy to predict problems when a method was compiled with Preferences  
compileBlocksAsClosures set true and, after it was distributed, whoever  
loads it has Preferences compileBlocksAsClosures set false.

Wouldn't it be time to make Preferences compileBlocksAsClosures a pragma  
(a method property), in the sense of a compiler directive, in the scope of  
the method being (re-)compiled.

/Klaus