1. Navigate to "HKCU\Software\HTC\Manila" in registry.
2. Creat a new DWORD "2a or 2b" with a value of 1.
2a. "DefaultBrowserIsIE" with a value of 1.
2b. "DefaultBrowserIsOpera" with a value of 1.
3. Reset your device.
http://forum.ppcgeeks.com/showthread.php?t=79474