Index: trunk/core/kernel/db/db_tag_processor.php
===================================================================
diff -u -r4945 -r4947
--- trunk/core/kernel/db/db_tag_processor.php	(.../db_tag_processor.php)	(revision 4945)
+++ trunk/core/kernel/db/db_tag_processor.php	(.../db_tag_processor.php)	(revision 4947)
@@ -302,7 +302,7 @@
 		if ($columns>1 && $direction=="V") {
 			$list->Records = $this->LinearToVertical($list->Records, $columns, $list->GetPerPage());
 			$list->SelectedCount=count($list->Records);
-			ksort($list->Records);
+			ksort($list->Records); // this is issued twice, maybe need to be removed
 		}
 
 		$list->GoFirst();
@@ -331,11 +331,14 @@
 			$this->Application->SetVar( $this->Prefix.'_id', $list->GetDBField($id_field) );
 
 			if ($i % $columns == 0) {
+				// record in this iteration is first in row, then open row
 				$column_number = 1;
 				$o.= $block_start_row_params['name'] ? $this->Application->ParseBlock($block_start_row_params, 1) : '<tr>';
 			}
 
 			if (!$list->getCurrentRecord()){
+				// doesn't add empty cell, by the fact it should add that much empty cells,
+				// how much elements are missing in last row, but not on cell as for now
 				$o.= $block_empty_cell_params['name'] ? $this->Application->ParseBlock($block_empty_cell_params, 1) : '<td>&nbsp;</td>';
 			}
 			else {
@@ -346,6 +349,7 @@
 			}
 
 			if (($i+1) % $columns == 0) {
+				// record in next iteration is first in row too, then close this row
 				$o.= $block_end_row_params['name'] ? $this->Application->ParseBlock($block_end_row_params, 1) : '</tr>';
 			}
 
@@ -1309,11 +1313,18 @@
 	function LinearToVertical(&$arr, $columns, $per_page)
 	{
 		$rows = $columns;
+		// in case if after applying per_page limit record count less then
+		// can fill requrested column count, then fill as much as we can
 		$cols = min(ceil($per_page / $columns), ceil(count($arr) / $columns));
 		$imatrix = array();
 		for ($row = 0; $row < $rows; $row++) {
 			for ($col = 0; $col < $cols; $col++) {
-				$imatrix[$col * $rows + $row] = $arr[$row * $cols + $col];
+				$source_index = $row * $cols + $col;
+				if (!isset($arr[$source_index])) {
+					// in case if source array element count is less then element count in one row
+					continue;
+				}
+				$imatrix[$col * $rows + $row] = $arr[$source_index];
 			}
 		}