Thanks to Mary, who just let me know about the problem, I'm now aware that my hotmail account was flagged on her blog with all sorts of red warning signs and cross boxes.
This has been a problem with my incoming hotmail ever since I set up this particular account, anything I post on this blog flags up red warnings and failed delivery, but if I open it anyway, its all there. Same goes for any comments I leave on my own blog. I have no idea what the problem might be, when I go to try and check I just get messages about phishing scams and dire warnings not to register my own email as 'safe'
Blogger seems to have been playing up of late, all sorts of problems with formatting and the like, but I'd just assumed everyone had the same problem with hotmail getting upset about comments left on individual's own blogs. If anyone knows anything about this, or how to sort it out, I'd be really grateful?