I just tried to see if this patch makes a difference (when changing the width of a inset with a graphics inside), but it does not look like it:
Index: src/BufferView_pimpl.C =================================================================== RCS file: /usr/local/lyx/cvsroot/lyx-devel/src/BufferView_pimpl.C,v retrieving revision 1.207 diff -u -p -r1.207 BufferView_pimpl.C --- src/BufferView_pimpl.C 2002/03/05 16:18:02 1.207 +++ src/BufferView_pimpl.C 2002/03/06 16:39:33 @@ -997,6 +997,7 @@ void BufferView::Pimpl::workAreaExpose() if (lyxerr.debugging()) textcache.show(lyxerr, "Expose delete all"); textcache.clear(); + buffer_->resizeInsets(bv_); } else if (heightChange) { // Rebuild image of current screen updateScreen(); -- Lgb