PASSED Manual Testing following the steps in the description.

Reproduced on:
Tomcat 7.0 + MySQL 5. Portal 6.1.10 EE GA1.

In console throw NPE error message.

Fixed on:
Tomcat 7.0 + MySQL 5. Portal 6.1.x EE GIT ID: 75eea5b6d07187864739026a062a8df59a8e293a.
Tomcat 7.0 + MySQL 5. Portal 6.1.x CE GIT ID: f7c91d539974329e93a485d71e4c1f2f9aee50af.
Tomcat 7.0 + MySQL 5. Portal 6.2.x GIT ID: 1aed0c438672d4200851ba3b802764c2efe2c0b1.

In console is not throw NPE error message.

Committed on:
Portal 6.1.x CE GIT ID: d48cd4902cccc96497141de312ee688417f2eb3e.
Portal 6.2.x GIT ID: f99a366ca17a101b4665dfca501a86cb22334470.

Thank you Alexey!

Problem is in html/common/themes/bottom_js.jspf in line:

for (int i = 0; i < layouts.size(); i++) {

problem is - due to implementation, in this case layouts is empty (see method ServicePreAction.getViewableLayouts for more details).

So, to avoid NPE we need just to wrap this for with

if (layouts != null) {