Lars Brinkhoff)
* bug fix: disassemly of funcallable instances works.
* bug fix: single stepping on PPC.
+ * bug fix: fix thread-safety problems in the type system (generally
+ manifesting as nonsensical errors like "STRING is a bad type specifier
+ for sequences" or "The value 1 is not of type FIXNUM")
* Improvements to the Windows port:
** floating point exceptions are now reported correctly.
** stack exhaustion detection works partially.