[fxwoody]

Ok guys! i manage to make the thumbnail to work perfectly with the "User Entered URL"
function !!

The way i work on my forum, is, i have sections that i want to display the thumbnails for each thread, so, in the option menu, i use "User Entered URL" and "Thumbnails Required" set to yes.
Now, u can also put the option "Thumbnails Required" to NO and it will also get automatically the thumbnail image you set up in the "No Thumbnail Replacement Image".

The way i made it work in my V4.1.1 is like this:

In New posting Templates / newthread

Find:

				&nbsp;<img id="display_posticon" src="{vb:raw selectedicon.src}" alt="{vb:raw selectedicon.alt}" />
			</div>

and paste after:

<!---urlthumbnail--->            
                    <vb:if condition="$show['thumbnailurl']">
			<div class="blockrow">
				<label for="thumbnailurl" class="full">{vb:phrase thumbnail_url}:</label>
				<input type="text" name="thumbnailurl" id="thumbnailurl" class="primary full textbox" value="" maxlength="250" />
			</div>
		    </vb:if>
<!---urlthumbnail--->

in editpost

find:

				<img id="posticon_preview" src="{vb:raw selectedicon.src}" alt="{vb:raw selectedicon.alt}" title="Selected post icon" />
			</div>

and paste after:

         <!---autothumbnail--->
            		<vb:if condition="$show['thumbnailurl']">
		<div class="blockrow">
			<label for="thumbnailurl">{vb:phrase thumbnail_url}:</label>
			<input type="text" name="thumbnailurl" id="thumbnailurl" class="primary textbox" value="{vb:raw threadinfo.thumbnailurl}" maxlength="250" />
		</div>
		</vb:if>
         <!---/autothumbnail--->

In plugin manager for "Product : Thread Thumbnails"
in the : "New Thread - Save Thumbnail, Datamanager"

replace everything with this:

if ($type == 'thread')
            {
                if($vbulletin->options['thread_thumbnails_thumbnail_source'] == '0')
                {
                    $dataman->setr('thumbnailurl', htmlspecialchars_uni($post['thumbnailurl']));
                }
                if($vbulletin->options['thread_thumbnails_thumbnail_source'] == '2')
                {
                 preg_match('/\[(img|IMG)\]\s*(https?:\/\/([^*\r\n]+|[a-z0-9\/\\\._\- !]+))\[\/(img|IMG)\]/', $post['message'], $matches);

                
                $dataman->setr('thumbnailurl', $matches[1]);
                }  
                if($vbulletin->options['thread_thumbnails_required'] == '1' && empty($post['thumbnailurl']))
                {
                    if($vbulletin->options['thread_thumbnails_thumbnail_source'] == '0')
                    {
                        $errors[] = $vbphrase['thumbnail_error_one'];
                    }
                    else if($vbulletin->options['thread_thumbnails_thumbnail_source'] == '2')
                    {
                        $errors[] = $vbphrase['thumbnail_error_two'];
                    }
                }            
            }

Hope it helps a few of you