There are three known workarounds you can try:
(1) Instead of CTRL-v, use SHIFT-Insert
(2) Use the Edit->Paste menu in your browser
(3) Change the preferences in your browser by editing the user.js file.
Click the OK button below for more help, or Cancel to return to the editor';
$string['delete'] = 'Delete';
$string['filebrowser'] = 'File Browser';
$string['forecolor'] = 'Font Color';
$string['fullscreen'] = 'Fullscreen editor';
$string['heading'] = 'Heading';
$string['height'] = 'Height';
$string['hilitecolor'] = 'Background Color';
$string['horizontal'] = 'Horizontal';
$string['horizontalrule'] = 'Horizontal Rule';
$string['htmlmode'] = 'Toggle HTML Source';
$string['imageurl'] = 'Image URL';
$string['indent'] = 'Increase Indent';
$string['insertchar'] = 'Insert Special Character';
$string['insertimage'] = 'Insert Image';
$string['insertlink'] = 'Insert Link';
$string['insertsmile'] = 'Insert Smiley';
$string['inserttable'] = 'Insert Table';
$string['italic'] = 'Italic';
$string['justifycenter'] = 'Justify Center';
$string['justifyfull'] = 'Justify Full';
$string['justifyleft'] = 'Justify Left';
$string['justifyright'] = 'Justify Right';
$string['layout'] = 'Layout';
$string['left'] = 'Left';
$string['lefttoright'] = 'Direction from left to right';
$string['linkproperties'] = 'Link properties';
$string['linktarget'] = 'Target';
$string['linktargetblank'] = 'New window';
$string['linktargetnone'] = 'None';
$string['linktargetother'] = 'Other (out of order)';
$string['linktargetself'] = 'Same frame';
$string['linktargettop'] = 'Same window';
$string['linktitle'] = 'Title';
$string['linkurl'] = 'URL';
$string['middle'] = 'Middle';
$string['minimize'] = 'Minimize editor';
$string['move'] = 'Move';
$string['normal'] = 'Normal';
$string['notimage'] = 'Selected file is not an image. Please select an image!';
$string['notset'] = 'Not Set';
$string['ok'] = 'OK';
$string['orderedlist'] = 'Ordered List';
$string['outdent'] = 'Decrease Indent';
$string['paste'] = 'Paste from clipboard';
$string['path'] = 'Path';
$string['percent'] = 'Percent';
$string['pixels'] = 'Pixels';
$string['popupeditor'] = 'Enlarge Editor';
$string['preformatted'] = 'Preformatted';
$string['preview'] = 'Preview';
$string['properties'] = 'Properties';
$string['redo'] = 'Redo your last action';
$string['rename'] = 'Rename';
$string['removelink'] = 'Remove link';
$string['right'] = 'Right';
$string['righttoleft'] = 'Direction from right to left';
$string['rows'] = 'Rows';
$string['selectcolor'] = 'Select color';
$string['selection'] = 'Selection';
$string['showhelp'] = 'Help using editor';
$string['size'] = 'Size';
$string['spacing'] = 'Spacing';
$string['strikethrough'] = 'Strikethrough';
$string['subscript'] = 'Subscript';
$string['superscript'] = 'Superscript';
$string['textindicator'] = 'Current style';
$string['textmode'] = 'You are in TEXT MODE. Use the [<>] button to go back to WYSIWYG MODE.';
$string['texttop'] = 'Texttop';
$string['top'] = 'Top';
$string['type'] = 'Type';
$string['underline'] = 'Underline';
$string['undo'] = 'Undo your last action';
$string['unorderedlist'] = 'Bulleted List';
$string['upload'] = 'Upload';
$string['vertical'] = 'Vertical';
$string['width'] = 'Width';
$string['wordclean'] = 'Clean Word HTML';
$string['zip'] = 'Zip';
$string['createanchor'] = 'Create anchor';
$string['anchorname'] = 'Anchorname';
$string['fontname'] = 'Fontname';
$string['fontsize'] = 'Font-size';
$string['formatblock'] = 'Format';
$string['nolink'] = 'Prevent automatic linking';
$string['alertnoselectedtext'] = 'You must select text first!';
$string['searchandreplace'] = 'Search and replace';
$string['findwhat'] = 'Find';
$string['replacewith'] = 'Replace';
$string['options'] = 'Options';
$string['regularexpressions'] = 'Use regular expressions';
$string['matchcase'] = 'Match case';
$string['closeafterreplace'] = 'Close after replace';
$string['replaceall'] = 'Replace all';
$string['itemsreplaced'] = 'items replaced!';
$string['searchnotfound'] = 'Search string Not Found!';
?>