- Fix bug that prevents proper database volume expansion
- Change database expansion error codes
- Fix bug in `$JUSTIFY` caused by lack of bounds checking
- Fix bug in `WRITE ?` caused by incorrect data typing
- Improve handling of `$X` overflow in terminal devices
- Fix socket support on AIX (>= 5.3), with help from Matthew Wilson
- Improve the `$&%SETENV` XCall on AIX (>= 5.2), with help from Matthew Wilson
- Add better support for HP-UX, with help from Matthew Wilson
- Fix bugs in the `^%RD`, `^%SS`, and `^%ZOSV` vendor routines
- Improve scoping in many vendor utility routines