What is the sense of this settings?
What is the functionality behind?
What is the definition a theme developer has to do to support the function?
I didn't found information at the docs.
In my opinion the basic meaning of that setting makes a lot of sense:
Modern web browsers support standards-based HTML and XHTML (starting with HTML 4.01), which should display in the same way across all browsers.
Like Ralf I am a little worried if it works - is it enought to select the legacy theme from theme selector or should we add something like $CFG->themelegacy = true; to legacy theme config.php ? Or is it actually built for IE5.5 and previous browsers (before IE6?)
Ralf H. originally asked the meaning of legacy browsers and legacy themes for translation in http://moodle.org/mod/forum/discuss.php?d=155987 and if you check for example code of pagelib.php or search "legacy" from files of moodle it obviously should work that way and we should see a different theme on IE6 - but like you said and like I noticed too in 2 of my previous posts that setting does not seem to work with plain selection of legacy theme in theme settings - not for pure IE6 and not for IE8 in Quirks mode. Something is probably missing from implementation of legacy themes - or none of us knows how to use them...
Who knows why it does not seem to take action? What have we missed? Petr?
Yes, all of those solutions sound neat.
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It is also possible that after a year or two we are talking about "legacy mobiles" and modern mobiles may be able to do the same things as current table PC:s - for example new Samsung Galaxy S mobiles can use 800px wide Display with 4.0” WVGA(480x800) 16M SUPER AMOLED,
Iphone 4 is using Retina display, 3.5-inch (diagonal) widescreen Multi-Touch display that can use 960-by-640-pixel resolution at 326 ppi.