So, in the theme of "If you want to do something right, do it yourself" or, in this case, with the help of a few friends.

So, without further ado, I present the 'Show Table Borders' bookmarklet v0.1.

It's only been tested in IE on the Mac, but you're more than welcome to tinker to get it to work wtih other platforms/browsers, but if you do, please let me know, so I can update the reference code here.

How to use:

1. Drag this link: Turn Tables to your favorites bar.
2. Navigate to a page that has tables.
3. Click the 'Turn Tables' link in the favorites bar

If it's working as it should, it will then iterate over the page you're looking at and set all the table borders to '1' so you can see them.

If you compose web pages with tables, especially if you do it by hand, you're thanking me right now... :-)