QTabBar/QTabWidget problems on S60

I have three questions about tab widget on S60.

1. I have an application with about 19 tabs. Whenever the user types something, it's updating the each tab's text for each user input. However, updating all of texts of 19 tabs are extremely slow which also slows down the user input as well. The testing device is about 300 mhz cpu. It seems like setTabText doing extra work for processing '&' shortcut in the label string. Is there any way to work around this?

2. When there are many tabs, it automatically displays scroll bar on the right side. I wonder how to access to those scroll bar instance in order to control the scroll position of the currently selected tab.

3. Why is qt's tab widget looking different from the native tab control provided by S60 sdk? Is it because qt has its own implementation for tab control?

Thanks for your help.