Roger has submitted patches for some of the items on your list (off topic for this issue), especially crashes and stalls. Some still need review and commits. Mac tends to be the most difficult platform to get tests on.

While these would be better discussed on other issues or on idle-sig (mirrored on gmane), I will briefly comment on a few.

Cntl-A selects the entire window on Windows, while Home sends the cursor to the beginning of the line. On the current command line, it first goes after the prompt, and alternates before and after with repetition. This is kbk's design. On old command lines, it only goes before, and that is a bug to be fixed. I think there is an issue, but cannot find it.

I have never seen unprovoked pasting, nor an unexpected startup delay when running from the editor.

I cannot find 'setCanCycle' in 2.7 or 3.3 Lib/idlelib/*.py and 'deprecated' only appears once, in a comment. I expanded the 'setCanCycle' to the entire cpython repository and still did not find it, so that is a complete mystery.