I don't think there's an official way but you can try adding space characters to the end of your titles until they are basically left-aligned. If your set of fences is pretty much fixed, that should work okay.

I don't know if they are needed (I can't test anything at the moment) but if regular spaces don't work, non-breaking space characters should remain at the end. To make one, hold alt while pressing 0 then 1 then 6 then 0 again on the number keypad (not the number bar). You can also try copying the non-breaking spaces between the quotation marks below.

non-breaking space: " "

narrow non-breaking space: " "

Thanks for the  replies. Will try that out.

Also, I noticed that sometimes after a reboot, Fences does not display unless the tiles unless I run 'Fences' again - it just dumps all the icons in the approximate area of the fences.

Once I run Fences all is OK.

The Enable Fences box is ticked - so I assumed it would auto start each time I reboot...

I did not realize I had to wait, I login, the screen comes up, and the icons appear all messes up, so I then run Fences and then the Fences then appear...

I will try waiting a bit longer...

EDIT: OK it takes a few seconds to populate the fences...

Cheers