Hi,
I am experiencing some rendering bugs in Sql Developer version 4.1.3 and 4.1.2 also. Simply, when I click a page in Sql Developer, i.e New, it does not render the dialog properly. This rendering problem affects all screens.
Here a screen shot:

I am using Centos 6, 2.6.32-504.el6, Java jdk1.8.0_60. I can provide additional information if you ask.
I have tested several suggested approaches about sqldeveloper.conf but they did not work.
Please help me to solve this problem. Thanks.