Filtering for nodes of a particular day

I created a view which summarizes nodes by day of a date field.

Although the overview shows

• May 5 2008 (2)
• May 28 2008 (1)

I can't see the nodes when clicking on a date.

Changing

SELECT DISTINCT(node.nid), node_data_field_tag.field_tag_value ... AND (node_data_field_tag.field_tag_value>='2008-05-28 00:00:00') AND (node_data_field_tag.field_tag_value<='2008-05-28 23:59:59') ) LIMIT 0, 15

to

SELECT DISTINCT(node.nid), node_data_field_tag.field_tag_value ... AND (node_data_field_tag.field_tag_value>='2008-05-28T00:00:00') AND (node_data_field_tag.field_tag_value<='2008-05-28T23:59:59') ) LIMIT 0, 15

shows the nodes (notice the 'T' added between the date and time strings).

I permanently changed date_views.inc to

//$query->add_where(date_sql('DATE', $table .'.'. $value, $field_type, $offset) .">='". str_replace('T', ' ', $range[0]) ."'");
//$query->add_where(date_sql('DATE', $table .'.'. $value, $field_type, $offset) ."<='". str_replace('T', ' ', $range[1]) ."'");
$query->add_where(date_sql('DATE', $table .'.'. $value, $field_type, $offset) .">='". $range[0] ."'");
$query->add_where(date_sql('DATE', $table .'.'. $value, $field_type, $offset) ."<='". $range[1] ."'");

I don't know who came up with str_replace('T',' ',...) in the first place but it still seems odd to me ... Is this a bug or a configuration issue? I only store year, month and day without timezone info.

Thanks for your suggestions