Failed to find block 'output_buffer' Error

[ShiversOfHorror]

Today I uploaded a few videos and photos, everything was great. A couple hours later, I go back in to the main page of the gallery and I now have this error:

Template error
Failed to find block 'file_line'(#(<!-- BEGIN file_line -->)(.*?)(<!-- END file_line -->)#s) in :

        <tr>
                <td class="tableb" align="center">
                        <font size="3"><b>{MESSAGE}</b></font>


                        <br /><br />
                </td>
        </tr>

I found this topic: http://forum.coppermine-gallery.net/index.php/topic,57009.0.html which led me to going into debug mode. Once in debug mode I get this error:

Template error
Failed to find block 'output_buffer'(#(<!-- BEGIN output_buffer -->)(.*?)(<!-- END output_buffer -->)#s) in :

        <tr>
                <td class="tableb" align="center">
                        <font size="3"><b>{MESSAGE}</b></font>
<!-- BEGIN file_line -->
                        <br />
                        <br />
                        {FILE_TXT}{FILE} - {LINE_TXT}{LINE}
<!-- END file_line -->

                        <br /><br />
                </td>
        </tr>

I looked through phpMyadmin database, I see the following "cpg_pictures' is marked as crashed and should be repaired" I went in and repaired the table. All seems to be working now.

I'm just curious why this might have happened. Is it just something that happens sometimes or did I do it somehow?

[Joachim Müller]

This is the last time that I remind you of board rules, as moderators had to do so frequently already, e.g. in

Let me remind you of board rules as well - you agreed to respect them when signing up. In your special case: post a link to your gallery.

You have a record of misbehaviour. Improve it or you'll get banned.

[ShiversOfHorror]

I'm sorry, I don't like posting my link unless needed and I didn't think I needed to post a link for it since technically my issue was already solved. and I was just looking for a reason why it had happened.

Anyhow, the link to my gallery is 

http://www.campblood.net/gallery

I got the same error again today for no reason, and again fixed it like I did above. I'm just curious as to why I might be getting this error, if there is something I am doing wrong.