TYPO3 Core

Working Scenario: One textarea per form works fine

Scenario with Problem: Custom table that uses multiple fields (without tabs) and 8 of these fields are textareas with RTE enabled, switching between RTEs

Problem: slow response after clicking in a RTE field (3-5 seconds)

1) Login to Backend
2) Edit an Element with multiple (in example: 8) RTE fields
3) wait for form to load and wait for all RTE fields to load
4) Scroll to one rte and click in input area
5) Measure time between click and cursor appears

Alternative for more visual effect:
do 1-4
5) beginn typing (until typing is "smooth" - even this lags a bit), move mouse cursor over another RTE input area
6) stop typing, immediatly afterwards click in RTE and begin typing
7) Measure time between begin of typing and letter appearance

• Safari and Chrome (perhabs every Webkit?) need 3-5 Seconds until cursor/letters appear. If there is only one RTE input, everything seems fine.
• IE and FF everything appears fine (i.e "immediately" or <1sec)

confirmed problem in current latest stable of Chrome (5.0.375.99)
confirmed problem in current latest dev of Chrome (6.0.453.1)
confirmed problem in latest stable of Safari (6.0.453.1)

all works fine in Internet Explorer (8.0.7600.16358), Firefox (3.6.6)
(all on Windows7 64bit)
(issue imported from #M15016)