Problem:    Python: garbage collection issues.
Solution:   Fix the GC issues: Use proper DESTRUCTOR_FINISH: avoids negative
            refcounts, use PyObject_GC_* for objects with tp_traverse and
            tp_clear, add RangeTraverse and RangeClear, use Py_XDECREF in some
            places. (ZyX)

Problem:    Vim and Python exceptions are different.
Solution:   Make Vim exceptions be Python exceptions. (ZyX)

Problem:    Python: Can't check types of what is returned by bindeval().
Solution:   Add vim.List, vim.Dictionary and vim.Function types. (ZyX)

Problem:    Python: Module initialization is duplicated.
Solution:   Move to shared file. (ZyX)

Problem:    Python: using magic constants.
Solution:   Use descriptive values for ml_flags. (ZyX)

Problem:    Python: Later patch does things slightly differently.
Solution:   Adjusted argument type changes. (ZyX)

Problem:    Python: Too many type casts.
Solution:   Change argument types. (ZyX)

Problem:    More can be shared by Python 2 and 3.
Solution:   Move more stuff to if_py_both. (ZyX)

Problem:    Memory leak in new regexp engine.
Solution:   Jump to end of function to free memory. (Dominique Pelle)

Problem:    New regexp engine compares negative numbers to character.
Solution:   Add missing case statements.

Problem:    New regexp engine is slow.
Solution:   Break out of the loop when the state list is empty.

Problem:    No easy to run an individual test.  Tests 64 fails when
            'encoding' is not utf-8.
Solution:   Add individual test targets to the Makefile.  Move some lines from
            test 64 to 95.

Problem:    Test 95 doesn't pass when 'encoding' isn't utf-8. (Yasuhiro
            Matsumoto)
Solution:   Force 'encoding' to be utf-8.

Problem:    GTK vim not started as gvim doesn't set WM_CLASS property to a
            useful value.
Solution:   Call g_set_prgname() on startup. (James McCoy)

Problem:    A Visual mapping that uses CTRL-G works differently when started
            from Insert mode. (Ein Brown)
Solution:   Reset old_mapped_len when handling typed text in Select mode.

Problem:    Uneccessary temp variable.
Solution:   Remove the variable.

Problem:    In the new regexp engine \p does not work on multi-byte
            characters.
Solution:   Don't point to an integer but the characters.

Problem:    In the old regexp engine \i, \I, \f and \F don't work on
            multi-byte characters.
Solution:   Dereference pointer properly.

Problem:    Regexp logs may contain garbage. Character classes don't work
            correctly for multi-byte characters.
Solution:   Check for end of post list.  Only use "is" functions for
            characters up to 255. (Ken Takata)

Problem:    Complex NFA regexp doesn't work.
Solution:   Set actual state stack end instead of using an arbitrary number.
            (Yasuhiro Matsumoto)

Problem:    Regexp debug logs don't have a good name.
Solution:   Use clear names and make it possible to write logs for the old and
            new engines separately. (Taro Muraoka)

Problem:    Compiler warnings on 64 bit Windows.
Solution:   Add type casts. (Mike Williams)  Also fix some white space and
            uncomment what was commented-out for testing.

Problem:    Can't build on HP-UX.
Solution:   Remove modern initialization. (John Marriott)

Problem:    Crash in regexp parsing.
Solution:   Correctly compute the end of allocated memory.

Problem:    Can't build with ruby 1.8.5.
Solution:   Only use ruby_init_stack() when RUBY_INIT_STACK is defined.
            (Yukihiro Nakadaira)

Problem:    Compiler warnings. Crash on startup. (Tony Mechelynck)
Solution:   Change EMSG2 to EMSGN. Make array one character longer.

Problem:    Cursor not restored after InsertEnter autocommand if it moved to
            another line.
Solution:   Also restore if the saved line number is still valid.  Allow
            setting v:char to skip restoring.

Problem:    No support for VS2012 static code analysis.
Solution:   Add the ANALYZE option. (Mike Williams)

Problem:    Syntax highlighting can be slow.
Solution:   Include the NFA regexp engine.  Add the 'regexpengine' option to
            select which one is used. (various authors, including Ken Takata,
            Andrei Aiordachioaie, Russ Cox, Xiaozhou Liua, Ian Young)

Problem:    Can't built with Python 3 and without Python 2.
Solution:   Adjust #ifdef. (Xavier de Gaye)

Problem:    Multi-byte support is only available when compiled with "big"
            features.
Solution:   Include multi-byte by default, with "normal" features.

Problem:    Build fails on Mac OSX. (Greg Novack)
Solution:   Undefine clear().

Problem:    There is ":py3do" but no ":pydo".
Solution:   Add the ":pydo" command. (Lilydjwg)

Problem:    Python garbage collection not working properly.
Solution:   Add support for garbage collection. (ZyX)

Problem:    Python: not so easy to access tab pages.
Solution:   Add window.tabpage, make window.number work with non-current tab
            pages. (ZyX)

Problem:    Setting curbuf without curwin causes trouble.
Solution:   Add switch_buffer() and restore_buffer().  Block autocommands to
            avoid trouble.

Problem:    Python tests are not portable.
Solution:   Use shiftwidth instead of iminsert. (ZyX)

Problem:    Tests 86 and 87 fail when using another language than English.
Solution:   Set the language to C in the test. (Dominique Pelle)