Simply removing the "x_map" line from the libclxclient3.symbols.* files fixes the build on Ubuntu Lucid -- the attached patch applies that change.
=== modified file 'debian/libclxclient3.symbols.amd64' --- debian/libclxclient3.symbols.amd64 2009-03-14 00:55:50 +0000 +++ debian/libclxclient3.symbols.amd64 2010-01-17 15:36:32 +0000 @@ -296,7 +296,6 @@ _znk8x_window12x_set_attribemp20xsetwindowattribu...@base 3.6.1-1~ _znk8x_window17x_set_bit_gravit...@base 3.6.1-1~ _znk8x_window17x_set_win_gravit...@base 3.6.1-1~ - _znk8x_window5x_ma...@base 3.6.1-1~ _znk8x_window6x_move...@base 3.6.1-1~ _znk8x_window8x_resize...@base 3.6.1-1~ _zti10x_callb...@base 3.6.1-1~
=== modified file 'debian/libclxclient3.symbols.i386' --- debian/libclxclient3.symbols.i386 2009-03-14 00:55:50 +0000 +++ debian/libclxclient3.symbols.i386 2010-01-17 15:36:34 +0000 @@ -296,7 +296,6 @@ _znk8x_window12x_set_attribemp20xsetwindowattribu...@base 3.6.1-1~ _znk8x_window17x_set_bit_gravit...@base 3.6.1-1~ _znk8x_window17x_set_win_gravit...@base 3.6.1-1~ - _znk8x_window5x_ma...@base 3.6.1-1~ _znk8x_window6x_move...@base 3.6.1-1~ _znk8x_window8x_resize...@base 3.6.1-1~ _zti10x_callb...@base 3.6.1-1~