General Support: Alignment, padding, & "/usr/bin/convert" message

I integrated Plogger beta version 3 into my website: http://harryandhermione.org/gallery.php, a test page for my gallery.

Plogger looks great but how can I change the thumbnail alignment so I have them centered instead of left aligned? I'm pretty proficient in css and I tried altering some codes in the Default Theme's CSS but nothing seems to work. What should I change? In what file? And with what coding? VIEW IMAGE TO SEE WHAT I MEAN: http://i64.photobucket.com/albums/h186/SmoiXa/b.jpg

Secondly along with the alignment, my gallery doesn't show the thumbnail padding in Internet Explorer like it does in Firefox. My CSS coding for my website doesn't include any image enhancements or options that would overwrite the CSS stylesheet in the theme, so I don't understand why the padding won't show up. When I remove my website integration and just have the gallery, the padding shows up: http://harryandhermione.org/archives/gallery/

VIEW IMAGE TO SEE WHAT I MEAN: http://i64.photobucket.com/albums/h186/SmoiXa/c.jpg

Lastly, this random "/usr/bin/convert" message keeps showing up every now and then when a new collection or album or picture loads. When I refresh the page, it goes away. This message doesn't show up everytime but it does show up once in a while, enough to make you annoyed. It showed up right after I had uploaded some images and before I changed or added anything different in coding after the install. Is there anyway to avoid this message completely? VIEW IMAGE TO SEE WHAT I MEAN: http://i64.photobucket.com/albums/h186/SmoiXa/a.jpg

Any insight or advice will be helpful. Thank you.

So I found out where the "/usr/bin/convert" message is showing it. It shows up because of the intermediate picture generator. I put my this as my "picture.php" file:

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<div id="use"></div>

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and placed it where the message shows up:

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<?php
plogger_get_header();
if (plogger_has_pictures()) {
while(plogger_has_pictures()) {
$row = plogger_load_picture();

print ' <div id="inner_wrapper"> <div id="big-picture-container">
<table style="width: 100%;">
<tr>
<td>
<h2 class="date">'.plogger_get_picture_date().'</h2>
</td>
<td class="align-right">
<h2 id="picture_caption">';
$capt = plogger_get_picture_caption();
print $capt;

print '</h2></td></tr></table><div id="use">';

// generate XHTML with thumbnail and link to picture view.
$imgtag = '<div class="photos-large"><img src="'.plogger_get_picture_thumb(THUMB_LARGE).'" title="'.$capt.'" alt="'.$capt.'"

/></div>';

$detail_link = plogger_get_detail_link();
$prev_link = plogger_get_prev_picture_link();
$next_link = plogger_get_next_picture_link();

print ' </div><table style="width: 100%;">
<tr>
<td id="prev-link-container">
'.$prev_link.'
</td>
<td id="next-link-container">
'.$next_link.'
</td>
</tr>
</table><br />';

print '
<center><a accesskey="v" href="/archives/gallery/'.plogger_get_source_picture_url().'" target="new_window"><img

src="'.plogger_get_picture_thumb(THUMB_LARGE).'" title="'.$capt.'" alt="'.$capt.'" /></a></center>';

print '<p align="center" id="description">' . plogger_get_picture_description() . '</p>';

print '
<table style="width: 100%;">
<tr>
<td id="exif-toggle-container" align="center"><div id="exif_toggle">'.$detail_link.'</div></td>
</tr>
</table>
<br /></div>';


print generate_exif_table($row["id"]);

// display comments for selected picture
print plogger_display_comments();
print '</div>';

}
} else {
print "No such image";
};
plogger_get_footer();
?>

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Then put this is my "gallery.cc" file:

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#use {display:none;
visibility:hidden;
}

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It made the messge disappear because I hid the the <div> that I made it go under.