This is so annoying that I actually created an Opera account just to comment on the matter. For a brief period, speed dial offered logos instead of thumbnails. Thumbnails make no sense on a small laptop. Who actually thought this was a good idea!?! Hello? The websites are virtually indistinguishable without a magnifying glass. My current version of Opera is 28.0.1750.48. At present, Opera Flags doesn't allow me to change the speed dial settings back to logos -- just thumbnails or differently organized thumbnails. This is just stupid. Sorry, but it's just stupidity. Stop farting around with these settings. At minimum, users should be given an easy option to switch between thumbnails and logos -- an easy switch.
Comment written in Firefox.