To reproduce, open LayoutTests/editing/pasteboard/4641033.html. Notice that the caret isn't painting when it is positioned right after the <select> element. This is a regression from r19706 (fix for bug 11974).
Created attachment 13273 [details] another attempt to figure out who should paint the caret Caret should generally be painted by the containing block of the caret node. Only exception is when the caret node is itself a block and the caret is inside it (not after it). This happens with empty editable block elements.
Comment on attachment 13273 [details] another attempt to figure out who should paint the caret r=me
Created attachment 13284 [details] yet another - added method to SelectionController for testing if caret is inside or outside the node based on Justin's comments - added test case for <div editable><select> case too
Comment on attachment 13273 [details] another attempt to figure out who should paint the caret Clearing the review, there is a new patch.
Comment on attachment 13284 [details] yet another r=me
Landed in r19785.