grid cleanup between data loads

Hi everybody,

Great to see 1.0.1 at the long last, isn't it?

Hope someone can help with my question. I have a grid with fixed layout (column number, sizes, formats, headers etc) that doesn't change throughout the life of a page. The data (both number of rows and their contents) do change however when database is searched. To minimize overhead I decided to create the grid once and as the new data is ready load it and refresh. Here's what I'm doing:

// clear selections
obj.setSelectionProperty("values", []);
// set number of rows
obj.setRowCount(reclistData.length);
// load data
obj.setDataText(function(i, j){return formats[j].dataToText(reclistData[i][j])}); 
obj.setDataValue(function(i, j){return formats[j].dataToValue(reclistData[i][j])});
// select the first row 
obj.setSelectionProperty("index", 0);
// refresh
obj.refresh();

and it works nicely if I didn't use sort on the previous data. When you sort, indexes of rows get all messed up, i.e. they are not sequential anymore, 0 is not the necessarily the first row etc. I believe it's needed to retain the selections across searches. However, the messed order survives the call to
obj.setSelectionProperty("values", []);
and produces script errors when grid is refreshed (e.g. row may have an index bigger than total number of rows etc).
Looks like I'm missing something. Any suggestions?

Many thanks,