Is it normal for a lens to continuously whirr in liveview mode that too with AF&IS-off ??

I have Canon 60D & 55-250 IS II lens which makes a constant whirring (appears like of motor) sound in liveview mode, camera being idle (no button pressed) even with IS and AF switch in off position. Sound is not loud, but one can hear it in silent environment.
sound type preview: 0:05-0:24 https://docs.google.com/file/d/0B_dfVOjfAyHdMXpfZHdJWTZKeGc/edit
With IS on (AF off), its again there in Live view mode & but with half press shutter button stops for a while and again starts with IS's clicking noise. When i release button, both sound stop for a while and that motor whirring sound starts again.
Nothing like this will happen when using View finder (AF off). Here idle camera's lens is silent. Only sounds (Clicking & whirring) when IS is on & i half press button. Release the button and its again silent.
Is this normal for a lens? Is anyone else's lens (may be other than 55-250mm) making this whirring sound? My main concern is, when IS/AF is off and i am not using camera, lens should not make whirring sound even with live view.

While booted off the disc the G5's fans go into overdrive, just like when the Mac kernel panics.
Normal.
Is 2.6.3 it as far as ASD's go for the late 2005 G5's??
Yep.

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Message was edited by: mfduran

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How do get rid of the twitter app when there's no trace of it except for update notices on app store and that too with a stranger's id ??

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Attachments:
codesnippet.vi ‏41 KB

I needed to make some grammatical/ nomelclature changes, But, Could not edit the previous post.
so posting again
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Drivers for Agilent 66xx series DC supplys in compatibility mode?

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(Mid-Level minion.)
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http://itunes.apple.com/tw/app/battery-doctor-hd/id459702901?mt=8
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http://tinyurl.com/b67c7xz
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Outlook to iPhone sync failure – Sync suddenly stopped working for calendar events but continued for contacts and notes.   Finally Fixed!!! SUPPORT TEAM – PLEASE SEE THIS – Complete explanation of cause and correction steps.

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SUPPORT TEAM – PLEASE SEE THIS – Complete explanation of cause and correction steps.
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Looking for a lens

Looking for a lens that will take sharp flower, bug photography, but also sharp portrait pictures. Thank you!

Incidentally, a true "macro" lens (1:1 image scale meaning image on the sensor is the same size as the object being photographed in real life) provides the best performance.
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Tim Campbell
5D II, 5D III, 60Da

Is it normal for a lens to continuously whirr in liveview mode that too with AF&IS-off ??

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