Webview while zooming black screen is coming

Hi Guys, While zooming the webview in my application.black screen is coming and going.recently i updated my os to 4.1.earlier it was working fine.this is happening in __sumsung __ device.using 1.Titanium SDK:3.0GA 2.Platform & version:Android 4.1, 3.Device:Sumsung 7"" tab 4.Titanium Studio:3 getting logs like this in ddms

04-24 11:24:57.058: E/WindowStateAnimator(364): createSurfaceLocked called attrs.flags=16908824
04-24 11:24:57.074: E/SurfaceFlinger(319): SurfaceFlinger translucent=1 isOpaque=0 isExternalDisplayLayer=0 isExternalBlockLayer0
04-24 11:24:57.074: E/SurfaceFlinger(319): SurfaceFlinger translucent=0 isOpaque=1 isExternalDisplayLayer=0 isExternalBlockLayer0
04-24 11:24:57.097: E/SurfaceFlinger(319): SurfaceFlinger translucent=1 isOpaque=0 isExternalDisplayLayer=0 isExternalBlockLayer0
04-24 11:24:57.097: E/SurfaceFlinger(319): SurfaceFlinger translucent=0 isOpaque=1 isExternalDisplayLayer=0 isExternalBlockLayer0