Hi Bill, I have to say that the flickering when scrolling does sound like a 
mouse issue, speaking from personal experience. Have you tried a different USB 
mouse? Cheers, Susan

Sent from my iPad

> On 19 May 2014, at 10:16 am, Ronni Brown <ro...@mac.com> wrote:
> 
> Hi Bill,
> 
> Mavericks is up to version 10.9.3 now. 
> Have you checked that Logitech have updated drivers for Mavericks for your 
> model mouse?
> Normally third-party software/add-ons etc need to be updated or they can 
> cause issues. 
> 
> I would suggest you download & install OS X Mavericks 10.9.3 Update (Combo)
> <http://support.apple.com/kb/DL1746>
> Do the normal preparation first: Repair Permissions - BackUp - Install the 
> Combo - Repair Permissions after installation completes.
> 
> You could also Go to System Preferences -  Accessibility and for the mouse 
> options or Trackpad options and set "scrolling with inertia".  
> 
> Cheers,
> Ronni
> 
> 17" MacBook Pro 2.3GHz Quad-Core i7 “Thunderbolt"
> 2.3GHz / 8GB / 750GB @ 7200rpm HD
> 
> OS X 10.9.3 Mavericks
> Windows 7 Ultimate (under sufferance)
> 
>> On 19 May 2014, at 9:56 am, Bill Parker <ren...@westnet.com.au> wrote:
>> 
>> Ronni,
>> 
>> A bit old fashioned here.  I only use a hard wired USB connected mouse ( 
>> Logitech in fact).  
>> 
>> Tried the suggestions below with no change.
>> 
>> Wondering if upgrade to 10.9.2 would help here?
>> 
>> Bill
>>> On 19 May 2014, at 9:10, Ronni Brown <ro...@mac.com> wrote:
>>> 
>>> Hi Bill,
>>> 
>>>> On 18 May 2014, at 11:03 am, Bill Parker <ren...@westnet.com.au> wrote:
>>>> 
>>>> However, Mail is still playing up and flickers like mad when scrolling!
>>> 
>>> Are you using a Apple Magic Mouse or a Trackpad? Does it only happen in 
>>> Mail App?
>>> Do you have installed any third-party software that might affect the mouse, 
>>> trackpad, or scrolling?
>>> 
>>> Check in System Preferences to see if anything has changed with your Mouse 
>>> settings or Trackpad settings.
>>> 
>>> If using a Magic Mouse, OS X Mavericks: Use an Apple Magic Mouse - 
>>> <http://support.apple.com/kb/PH14260>
>>> 
>>> You could try deleting the mouse.plists
>>> 
>>> You need to look in your User Library/Preferences for the .plist.
>>> Either hold down the option key while using the Finder “Go To Folder” 
>>> command and select your user Library in your home folder or use the Finder 
>>> “Go To Folder” command and enter ~/Library/Preferences.  Move the .plists 
>>> to your desktop.
>>>  
>>> Test. If it works okay, delete the plist(s) from the desktop.
>>>  
>>> If the same, return the .plist(s) to where you got them from, overwriting 
>>> the newer ones.
>>> 
>>> Cheers,
>>> Ronni
>>> 
>>> 17" MacBook Pro 2.3GHz Quad-Core i7 “Thunderbolt"
>>> 2.3GHz / 8GB / 750GB @ 7200rpm HD
>>> 
>>> OS X 10.9.3 Mavericks
>>> Windows 7 Ultimate (under sufferance)
> 
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