File manager no longer prompting for file overwrites

I'm currently running 11.30.6 on my vps. When I was on 11.30.5, the file manager used to ask me if I wanted to overwrite files that already existed if I didn't check the overwrite checkbox.

It seems that since upgrading to 11.30.6 (manual upgrade), if I leave the overwrite box unchecked it simply fails with 'file already exists' rather than asking what i want it to do.

Does anyone know how to restore the old behaviour? I've looked through the tweak settings in WHM, but can't find anything that would restore this.

 

I never thought that it could be the theme. I'm using rvskin. I've just tried switching back to x3, and it now asks me whether to overwrite or not. I'll try rvskins forum for assistance with it.

Thanks