Before last night, i only knew that Shiira is based on the Apple WebKit engine. But a incident tells me more about that.
     Days ago, I downloaded the Safari 1.3 DP 5.(developer Preview 5) and get a try. everything is fine at first. But then from the day before yesterday, i just cannot open the gmail website. I just gives me a blank page after loading.
     At first, i havent thought about  the Safari 1.3 staff, but i am sure it is due to the browser. Then i tried Shiira, either Does not work! This can only tell me that it is not my browser's problem but the gmail server itself. So i was out to post a thread on sinomac.com.
    Luckily i get a inefficient Chinese Input program. Before i finish that post, one idea jump into my mind: maybe it is due to the "DP5"?
    Ok, the followings are easy le. Uninstall safari 1.3 and reinstall 1.2. Gmail web page is back! Shiira is also back to the track!
    It seems that Shiira is directly based on the Safari that i get in my OS. If this is the case, then there should be no compatible difference between two.
    Need more information on web browser engine!