Hi there,
I'm running an account which shares a few websites. I install an older version of sliverstripe a few months ago on a couple of sites. However, now when I try and install version 2.4.4, i get

User 'xxxx' needs to be able to write to this file:
/tmp/silverstripe-cache

The file is currently owned by 'yyyy'. There is no user-group that contains both the web-server user and the owner of this file. Change the ownership of the file, create a new group, or temporarily make the file writeable by everyone during the install process.

I've looked through various websites, created my own silverstripe-cache folders, chaged settings etc, but nothing works.
if i create my own 'silverstripe-cache' folder, it starts installing, but then fails with:

[Warning] is_readable() [function.is-readable]: open_basedir restriction in effect. File(/dev/urandom) is not within the allowed path(s): (/home/northern:/usr/lib/php:/usr/bin:/usr/php4/lib/php:/usr/local/lib/php:/usr/local/php4/lib/php:/tmp)
POST /install.php

Seeing how i installed multiple silverstripe sites, on different user accounts a while back, it leads me to think either some server settigns have changed, or this is a problem with the latest version of silverstripe.

An easy way to check would be to find an older version and try reinstalling, but i can't find any older versions?

Any help appreciated.

on

Since posting, I've added

php_value session.save_path '/home/myaccount/tmp'
php_value upload_tmp_dir '/home/myaccount/tmp'
PutEnv TMPDIR '/home/myaccount/tmp'

to the .htaccess file - this stops the errors displaynig in the install screen, but when installing i'm still getting all the basedir errors

it's happening on
/home/myaccount/public_html/silverstripe/sapphire/security/RandomGenerator.php with the line
if(!$isWin && is_readable('/dev/urandom') && ($h = fopen('/dev/urandom', 'rb'))) {

*** Note: I just noticed ajshorts comment too - will try and in a minute...