dhruwal

Option 2 suggested above worked.
2- replace the new render_screen_layout by the old one (quick, dirty, but it works!)

just goto wp-admin/includes/class-wp-screen.php

Replace entire render_screen_layout function with this old version which works.

public function render_screen_layout() {
		if ( ! $this->get_option('layout_columns') )
			return;

		$screen_layout_columns = $this->get_columns();
		$num = $this->get_option( 'layout_columns', 'max' );

		?>
		<h5 class="screen-layout"><?php _e('Screen Layout'); ?></h5>
		<div class='columns-prefs'><?php
			_e('Number of Columns:');
			for ( $i = 1; $i <= $num; ++$i ):
				?>
				<label class="columns-prefs-<?php echo $i; ?>">
					<input type='radio' name='screen_columns' value='<?php echo esc_attr( $i ); ?>'
						<?php checked( $screen_layout_columns, $i ); ?> />
					<?php echo esc_html( $i ); ?>
				</label>
				<?php
			endfor; ?>
		</div>
		<?php
	}