I've started up a new blog; on my old blog I never had this issue.
In the Reading settings on WordPress, I have selected "full text" for the feed. I have applied the "Feedburner feedsmith" plugin to redirect the default feed to my feedburner account, but within the feedburner page "View feed" option (and consequently in any resulting RSS reader), only a summary is shown. There are no settings in feedburner to alter the original feed apart from "summary burner" and I have that deactivated (and even if it were activated, I would still see the full feed in the view feed option), so the problem must be coming from WordPress. I have no other installed plugins that affect RSS feeds. Here is the feed:
Any suggestions?? :)