I clicked on "View the details of unsolved problems on one page" and got:
Warning: include(static/problems_data_06.php) [function.include]: failed to open stream: No such file or directory in /mounted-storage/home81c/sub002/sc17392-BXBG/projecteuler.net/includes/view_all.php on line 11
Warning: include(static/problems_data_06.php) [function.include]: failed to open stream: No such file or directory in /mounted-storage/home81c/sub002/sc17392-BXBG/projecteuler.net/includes/view_all.php on line 11
Warning: include() [function.include]: Failed opening 'static/problems_data_06.php' for inclusion (include_path='.:/usr/local/lib/php/') in /mounted-storage/home81c/sub002/sc17392-BXBG/projecteuler.net/includes/view_all.php on line 11
Problem 175
(Followed by problem 175's text without error).
My unsolved problems are 175 and 177 only, so it looks like the issue is associated with 177.
This appears repeatable at the moment.
Let me know if you'd like me to try anything to help diagnose.
There's still an issue, I'm afraid. The PHP diagnostics have gone away, but now that same page shows only the details of problem 175, omitting all mention of problem 177 completely.