I checked the logs and it indicated a problem with my wp theme functions.php.
It’s bizarre because I didn’t touch that file and don’t know how it could have got borked as the date of the file on the server was the same as rest of the theme install which was weeks ago.
Anyway, I uploaded a new version and I’m back in business. Perhaps the timing with the bbpress install was coincidental. Still… I’m perplexed.
I haven’t changed the .htaccess file at the wp root.
At the bbpress root the .htaccess file has one line:
“Options +MultiViews”
By plugins I mean wp plugins… basically any form action in wp admin ends at a blank page. The form action seems to be properly executed but then before returning to the right page, it stalls and I get a blank page. The name of that page depends on the form submitted.
BTW I don’t have the sitemap plugin which upon surfing around seems to cause the same problem.
