Exposed Filters not compatible with alpha pager sort item

5.x-1.4, Code, feature request, normal, won't fix

To recreate
Create a view with an exposed filter for a CCK text field
Use Views alpha pager
With no text entered in the exposed filter text field, the alpha page functions perfectly.
Insert some text in the text field and hit search - the search works fine.
The alpha charachers are now reduced to just the one beginning with the filter text.
EG
Search for 'Ab'
Results beginning with 'Ab' are shown [as per exposed filter settings]
The Alpha pager showns just 'A' and 'All'
Expected result - All Aplha pager links
Secondary issue - possibly related to http://drupal.org/node/183425
When clicking 'All', the filter text gets carried through - and therefore the 'All' listing only has those as defined the by the filter result.
The resultant Url looks like 'search?filter0=Ab&apage=* '
Maybe I'm doing something wrong in the config of the view?
Regards
Alan