More future plans and a clarification in the block comment at the top of uitask_windows.go.
Removed a TODO from init.go that was already in the future plans document.
Moved TODOs about stripping non-Windows XP constants to future plans; also reworded a comment in comctl_windows.go.
Removed a TODO about GetLastError() being set in comctl_windows.go, rewording the error message itself to compensate instead.
Cleaned up/removed some (not all) TODOs in init_windows.go.
More Windows TODO cleanup/removal and future plans. The message-only window in uitask_windows.go now has a title.
Moved TODOs about new event signals to the future plans document.
More future plans.
Got rid of another TODO about GetLastError() in the same way as earlier (this time in stdfont_windows.go); also fixed capitalization on the earlier one.
Changed a TODO in listbox_darwin.go that, when my Mac OS X setup chooses to cooperate, will let me make the inefficient code in question efficient.
Added a sanity check for stretchy control indices in the Grid code.
Resolved Grid TODOs: moved feature requests to future plans and made sure SetStretchy() doesn't leave previous stretchy controls filling by accident.
Decided not to deactivate the Windows Common Control 6 manifest activation context since it's active for the life of the program already.
More future plans.
Reformatted the list of Raymond Chen's scrollbar series pages into a proper Markdown list... guess I'll run through that now.