//v.1.5 build 71114
Error: _isOpera is not defined
Source file: localhost/script/codebase/dhtmlxcommon.js
Row: 36
Problem can’t be reconstracted locally , actually this variable in same file , it set as global and direclty while file loading, so it must be available for any function call.
Actually there was no changes in this part of dhtmlxcommon between existing and previous versions of dhtmlxgrid.
If problem still occurs for you - please send any kind of sample where it can be reconstructed.