[TYPO3-core] TYPO3 4.5, IE9 and ExtJS

[Stanislas Rolland]

Hi Jigal,
>>
>> Perhaps we should consider upgrading ExtJS to 3.4 in TYPO3 4.5?
>
> I'm not sure what the impact of that upgrade is, but the 4.5 backend
> uses a X-UA-Compatible tag set to IE=8 to let IE work in IE8 mode.
> Are these reports from people who force IE into IE9 Standards mode?
>
> If I visit 4.5 with IE9 it reports that the document mode is IE8
> Standards. Page tree is working (including drag'n'drop creation and
> deletion of pages, ExtJS demo extension (for all widgets) is working as
> far as I can determine (even sliders).
>
You're right. When using IE8 standards, the backend does work. So the 
problem arises only when IE9 standards is forced.

Another issue is when the RTE is used in the frontend. If the page is in 
IE9 standards mode, the RTE is broken due to ExtJS 3.3. Do you think 
that forcing IE8 standards on the containing page would be acceptable?

Stan