It seems to have a problem with the way atahualpa handles the textareas.
Everything was working great for a few day, then now, when I go to the theme configuration panel, all the dynamic textarea are blocked to one line ( which is a blocker problem... ) and no longer expands.
Firebugs returns the following error :
uncaught exception: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIDOMNSHTMLTextAreaElement.selectionStart]" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: http://[...]/wp-content/themes/a...or-textarea.js :: anonymous :: line 54" data: no]
Any clues ?