I recently updated the presentation of some custom forums on my site, so that now they are using HTML5 as well as taking advantage of drop shadow and curved border css effects. Since making this change, however, a number of users accessing the forums from their iPod are complaining that typing in the textarea lags very badly, whereas it hadn't before I made the change.
The user agent of the affected iPods: Mozilla/5.0 (iPod; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5
Any ideas? It seems like it's obviously a browser bug, but it's a bug I'd like to avoid triggering!
Preliminary question: did you run the new html and css through the "mobileOK" validator? Some of what they tell you will be over the top (in particular, the iPad will take anything you throw at it and come back for more) but it gives a useful starting point.
Thanks, I wasn't aware of that validator. I changed from serving HTML5 to <!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.2//EN" "http://www.openmobilealliance.org/tech/DTD/xhtml-mobile12.dtd"> and users are reporting that it's functioning better now. I guess this device doesn't play nice with HTML5.