64 bit Win 7 with 32 bit debug build.
Patch imported cleanly with all 3 branches. I cannot currently test 2.7. On 3.3 and 3.4, debugger worked fine relative to this issue: editor window highlight tracked line displayed in debugger as far as I checked.
Normal selection and Shell Go to file/line highlight seem to work normally. Normal color marking seems not affected. I cannot think of any more manual tests. So if someone else checks 2.7 and it is also ok, I think you should apply this, so if there is any problem, it can show up in other usage. We can deal with a patched tk if and when it happens.