IE 8 is Supported for the following cases in R12

The Cases are given bellow:
E-Business Suite Release 12.0 Prerequisites

• Oracle Applications Technology R12.ATG_PF.A.DELTA.6 (patch 7237006) or later
• Oracle Forms Version 10.1.2.3 or later
• Desktop client running Microsoft IE 8 on:

• Windows XP Service Pack 2 or 3
• Windows Vista Service Pack 1 or 2

E-Business Suite Release 12.1 Prerequisites

• Oracle E-Business Suite 12.1.1
• Desktop client running Microsoft IE 8 on:

• Windows XP Service Pack 2 or 3
• Windows Vista Service Pack 1 or 2