This is not to do with lotus notes, it's easy in notes just use centered text formatting, but with web browsers it is not as easy.

There seems to be a lot of investigation in to this on the web, but I found the solution eventually.

I use this to centre thumbnails that have not been squared off but cropped to fit in a square.

The trick was to use span.

This code should work:

<td width=50 height=50 style='text-align:center vertical-align:middle;'>

<img src='blah.jpg'>

</td>

but it doesn't work.

You need to do:

<td width=50 height=50 style='text-align:center vertical-align:middle;'>

<span style='display:inline-block;'>

<img src='blah.jpg'>

</span>

</td>

I hope that helps someone else.