Actually, have just fixed it using Platform theme – by downloading the BP template pack, following the instructions in there to move the 6 folders from bp-default into platform: https://buddypress.org/2011/09/boo-yah-buddypress-template-pack-1-2-is-bp-1-5-compatible/
They have now appeared as pages, so more to test, but they are no longer blank and alive with words and images – thank you Buddypress!
Hi, I had blank pages after upgrading – at the time I had custom community theme. I uninstalled buddypress via ftp and dropped all the database tables. (I also uninstalled and reinstalled wordpress too at one point). I tried all of these as well https://codex.buddypress.org/troubleshooting/blank-pages/ , thanks to mercime, but unfortunately still got the same errors.
I tried bp default theme and was then able to see the dashboard but the front end pages were all blank. I have started using Elbee Elgee and was able to see dashboard and set up forums, groups ok on the front end (the only thing which doesn’t work so far – but I haven’t tested everything is create topic in forum).
@Lynn The issue with your sidebar on http://clandestinecakeclub.co.uk/ looks like widgets have just not been assigned to your left sidebar via your widget settings panel.
Image, title, and link of… what? Posts from your blog(s)? If so, that’s all standard WordPress theming and has nothing to do with BuddyPress making it any harder.
I think the first example at http://wordpress.stackexchange.com/questions/13020/display-thumbnail-only-on-the-very-first-post-in-the-loop will get you started! 
This isn’t possible in the current version of BuddyPress, and I’ve not seen any plugins that do this. This sort of thing is something the core team is keeping in mind for future releases.
@bakelady The issue is with your custom theme (https://wordpress.org/extend/themes/bp-columns), not BuddyPress itself. @modemlooper, are you still supporintg bp-columns?
@DJPaul just noticed that it is correct – once the page refreshes the title is correct, “Remove Fav..”
It is a WPMU with BuddyPress which I set up a few months ago. It is still only a test site, so not live with lots users (who be a bit fed up by now).
I have the domain mapping plugin from wpmu installed, though none of my subdomains are being mapped at present. The problem is simply with pure subdomains on existing blogs created while previous version of BP was installed. And on new blogs created too.
Problem only exists while BuddYpress 1.5 is activated. I deactivate BP and all my subdomains are back.
@fswd
Bad Hammer looks better. I’ll delete the Block by Maths and use that as it gives a list of who is spammer etc and who isn’t. As you say, it’s also been tested.
@fswd
The ‘Block Spam by maths’ seems to be doing the trick in stopping the robot members. I haven’t had any since I activated it last night, I’ve had legitimate members joining which shows it still allows humans to join. But I’m still cautious about widgets that show a ‘not tested’ warning, so I would be very interested in knowing if the one you are testing works out ok.
@paul Gibbs Thanks for reassuring me that I don’t have to keep changing browsers.
I just have to solve the problem of why I can’t have 3 columns back on my site instead of the two, it looks awful. Any suggestion as to where I post a troubleshoot question for this little problem. Take a look and you’ll see what I mean. http://clandestinecakeclub.co.uk/
BuddyPress sets up component pages where it is installed. In your case, the main site. Do you have BP_ENABLE_MULTIBLOG in your wp-config.php ?
P.S. I want to use a child theme of twenty eleven with little customization I made, if that will make things any different.
thanks, but as indicated earlier, i switched to the default theme (bp 1.5) and received the exact same error message 
doesn’t make sense at this point to have both the main site AND the buddypress section down so i put the custom theme back.
Read this page a code snippet for displaying profile fields in member header https://codex.buddypress.org/extending-buddypress/tips-tricks/
PLUGIN: Ban Hammer does not display a ‘not tested’ warning if using WP 3.2.1
It’s a lightweight plugin that blocks repeat bot domains by manually added to a list.
It’s loaded on our site with no issues – will see how it performs.
@martinavive, What is the URL to your site and i will tell you css to do that.
regards
@Lynn I’m going to quickly check out this spam blocker plugin now:
https://buddypress.org/community/groups/ban-hammer/
Will let you know how it goes.
@PaulGibbs – Still have problems with the Widget drop-downs. Guess you’ve not got around to this one yet, (which is cool).. No stress – just wanted you to know!
Thanks for the reply! I agree that a hack wouldn’t be a good idea. I guess you helped to clarify my question. I don’t want to have a second theme. I like the style and look of my site overall, but it seems to interfere with the way that buddypress looks and fuctions. It just isnt’ as easy to use and navigate as the basic buddypress theme. I don’t know how extensive the coding would be, so I may or may not be able to do it myself. We would definitely look into outsourcing the work if its something that would give us a good end result.
By the way, I am using wordpress template pack. Would you be able to elaborate your suggestion about copying over the styling, etc. Thanks again!
Ah, so it’s a dodgy plugin? Excellent. We should make a list somewhere.
@bakelady Any browser should be fine – I was just working through possible ideas about where the error was
@Lynn We have used Block Spam by Math plugin on several sites now for well over a year with no issue so far. Give it a spin and see!!
Cool spot. Can you report this as an enhancement on http://buddypress.trac.WordPress.org please? You can use your username and password from this site to log in with. Thanks!
