Item separator line are not shown all in ListView! maybe textSize is the reason or Bug?

Question

As you can see in this screenshoot ListView doesn't show all item separator, seems that the problem is setting textSize for textView, if i remove textSize all work fine.

Thanks in advance for any replay!

This is a little testcase:

Answer 1

this is screenshoot http://i.imgur.com/RcDMO.png

Answer 2

and this is a little testcase: http://pastie.org/1218668