parts of forms like input buttons or selects can be selected even with -webkit-user-select: none turned on. these parts are the "empty" spaces on the left and on the right of the forms text. (i'm talking about elements like <input type="button" value="text" /> and <select size="1"> here)
Created attachment 11791 [details] Testcase for <input type="button"> and <select>
Regression?
Yes, it is a regression since the old AppKit controls never allowed selection.
I think Hyatt fixed this recently. Alex, can you check?
Yes, it's fixed in the latest nightly.