jQuery Grid Plugin - jqGrid

Hi,

I'm facing some strange bug using "stable" version, and so I decided to use the the GitHub version because I read in the forum that some problem I'm facing has been fixed...for ex. in IE8 when I'm editing a record and the fields are "select combo" the value I'm editing is lost, because the combo start always from 1st value and not the current value.

But, changing to github version, using grid.loader produced many errors like:

$.jgrid.extend is not a function
restoreRow : function(rowid, afterrestorefunc) {
grid.inlinedit.js (line 279)

$.jgrid.extend is not a function
getChangedCells : function (mthd) {
grid.celledit.js (line 450)

$.jgrid.extend is not a function
toggleSubGridRow : function(rowid) {
grid.subgrid.js (line 271)

$.jgrid.extend is not a function
FormToGrid : function(rowid, formid, mode, position){
grid.formedit.js (line 1957)

$.jgrid.extend is not a function
"avg" : function(v, field, rc) {
grid.grouping.js (line 286)

How to proceed?

Thanks

Max