Hi, I too am being affected by this problem, I need to use POI 3.5beta4 for its support of OOXML file formats, this then breaks my ability to render XLS files from JasperReports because of the removed (instead of deprecated) method addMergedRegion. Are there any plans to release a patch to JasperReports, or is there a place were I can get a preview/patched copy that fixes this problem? Thanks, Andy.