Sony Japan has released firmware ver 4.0 for the PSP. If you use the PSP for watching movies then there is good news for you, with the ▲▼ keys you can adjust the video playback by watching it in slow motion at 0.5X the speed (above image) or in FF at 2X speed (first image after the jump). This is possible only for video recorder on the Memory Stick and not on the UMD's. The much awaited Google search button is also added which also stores your previous 20 searches.

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