Checking problem for Checkbox in Tabs

[DDE31]

I have a problem when using a checkbox input in a tabs.

If the checkbox is originally checked, the "check image" is not the normal one. It look like a "^".

If the checkbox originally NOT checked, the "check image" is the normal one. and it run OK.

If have tried several solutions, but everytime I use Checkboxradio with Tabs, I have the same problem.

Any idea to solve this ?

thanks for your job, it's great !