Gmail layout not working due to hidden Opera settings

Gmail layout not working due to hidden Opera settings

It's crazy that all my threads are being closed without saying why.
I DID search the forums, the FAQ and whatsoever. There is NO solution anywhare and there actually IS a problem.

Okay.
My screen sho here :

This is how our gmail looks like if we don't go to Basic HTML version.

I tried everything possible.

I have a windows user which works (not mine) and my user doesn't work on any machine I have.

I compared all the settings and put the same, I deactivated all userjs, all blocked content everything.
There must be some hidden settings that provoke that (since layout update on gmail) but which one ?
Maybe someone at Opera could help instead of closing threads without explanation nor link to solution ?

I tried everything I could and I don't want to clean all my profile folder (I don't want to lose searches, notes, etc.)

OH MY GOD I FOUND THE SOLUTION !!!

For some reason, I'm using a personalied User Agent string by adding some text in the ISP ID field.

If mail.google.com themes are broken, make sure you clean (default and save) this setting (opera:config#ISP : Id) and then restart Opera.

Now I guess this is a bug (using ISP string should be OK). But is that a Google bug or an Opera bug now ?
I'm happy anyway. Even if I have to stop using ISP string. I'll get used to that.