Can you provide us with the code on how you are uploading it?

sure

here is the blade form:

{!! Form::open(array('url' => '/ex1upload', 'class' => '', 'method' => 'post', 'files'=>true)) !!}

    <input name="mediaable_type" type="hidden"  value="App\exObj1"/>

    <div class="col-xs-6 col-md-6 adjustabit2 pull-left ">
        {!! Form::file('file[]', array('multiple'=>true)) !!}
    </div>
    <div class="col-xs-2 col-md-2  ">
        <input class="" type="text" name="caption" size="22" placeholder="caption...">
        <input class="" type="text" name="description" size="22" placeholder="description...">
        <input name="mediaable_id" type="text"   placeholder="ex1obj ID..." />
    </div>

    <div class="col-xs-2 col-md-2">
        <input class="pure-button pure-button-primary pull-right" type="submit" value="Upload">
    </div>
    {!! Form::close() !!}

and here is the store method in the controller:

if (\Input::hasFile('file'))
...
foreach ($all_uploads as $upload)
            {
                if ($this->validate_upload($upload))
                {
                    if ($this->move_one_file($upload)==false)

move_one_file:

the main part is:
        // move file
        try {
                $file()->move($targetDir, $Filename);
        } catch (Exception $e) {
            return false;
        }

thanks

Unfortunately, I still can't fully tell what's going on, but I would guess that your error is coming from this line:

$file()->move($targetDir, $Filename);

What does the $file() method do? If it's not a method and you are just accessing the file, then you would want to do this:

$file->move($targetDir, $Filename);

thanks - that was just a bug...you are right...but it still does not solve the corrupt files :-(

How is the file corrupt?