Steps to Reproduce

1. run attached zul with chrome 38

Actual Result

listbox in vlayout has missing bottom border and in hlayout has missing top and bottom borders.

Expected Result

no missing borders.

Debug Information

• firefox and IE 11 doesn't have this issue.
• I notice that when height is a decimal number e.g. 56.75, the issue happens. While height is an integer, this issue disappears.
• in 6.5.7, when font size > 10px will have this issue, in 7.0.3 some font size bigger than 10px will have this issue.
• chrome 37 doesn't have this issue.
• It relate to chrome's support for WriteDirect, disable that feature will also eliminate this issue.

Extra Information

The customer uses 6.5.7.

Workaround

• change font size
• replace with hbox or vbox
• set fixed height on a listbox
• set style with margin-bottom: 1px or margin-top: 1px