If you downgrade to 5.2.14, the error disappears.
At the moment the causes of errors are found, ask for help.

We'd need more information than what you gave. First, are you using 5.2.15 or 5.2.16. If you're using 5.2.15, upgrade.

Then, what exactly is causing this (not a vague it may be root folder or name/group or open_basedir) and, preferably, steps to reproduce, would go a long way.

Thanks.

The problem exists on php 5.2.15 and php 5.2.16.
I'm using php 5.2.14, as work is needed for all sites.

php.ini on the affected account:
register_globals = Off
display_errors = Off
log_errors = On
max_execution_time = 30
memory_limit = 128M
upload_max_filesize = 16M
post_max_size = 16M
session.save_path = "/ home/saki2/data/tmp"
upload_tmp_dir = "/ home/saki2/data/tmp"
open_basedir = "/ home/saki2: / tmp: / var / tmp"

; [suhosin]
; suhosin.log.syslog = E_ALL & ~ S_SQL
; suhosin.log.sapi = E_ALL & ~ S_SQL
; suhosin.executor.include.max_traversal = 4
; suhosin.executor.func.blacklist = popen, dl, passthru, system, exec, proc_open, shell_exec, proc_close, symlink

; WARNING!!!!
; Or eAccelerator or Zend!!!
; Not twice!!!

; [eAccelerator]
; zend_extension = "/ usr/local/lib/php/20060613/eaccelerator.so"
; eaccelerator.cache_dir = "/ home/saki2/data/tmp"
; eaccelerator.debug = "0"
; eaccelerator.shm_size = "16"

; [Zend]
; zend_optimizer.optimization_level = 15
; zend_extension_manager.optimizer = "/ usr/local/lib/php/20060613/Optimizer"
; zend_extension_manager.optimizer_ts = "/ usr/local/lib/php/20060613/Optimizer_TS"
; zend_extension = "/ usr/local/lib/php/20060613/ZendExtensionManager.so"
; zend_extension_ts = "/ usr/local/lib/php/20060613/ZendExtensionManager_TS.so"
php.ini in the working account:
register_globals= Off
display_errors= On
log_errors= On
max_execution_time= 900
memory_limit= 512M
upload_max_filesize= 16M
post_max_size = 16M
session.save_path = "/home/bravohost/data/tmp"
upload_tmp_dir="/home/bravohost/data/tmp"
open_basedir = "/home/bravohost:/tmp:/var/tmp"

;[suhosin]
;suhosin.log.syslog = E_ALL & ~S_SQL
;suhosin.log.sapi = E_ALL & ~S_SQL
;suhosin.executor.include.max_traversal = 4
;suhosin.executor.func.blacklist = popen,dl,passthru,system,exec,proc_open,shell_exec,proc_close,symlink

; WARNING!!!!
; or eAccelerator or Zend!!!
; not twice!!!

[eAccelerator]
zend_extension="/usr/local/lib/php/20060613/eaccelerator.so"
eaccelerator.cache_dir="/home/bravohost/data/tmp"
eaccelerator.debug="0"
eaccelerator.shm_size="16"


;[Zend]
;zend_optimizer.optimization_level=15
;zend_extension_manager.optimizer="/usr/local/lib/php/20060613/Optimizer"
;zend_extension_manager.optimizer_ts="/usr/local/lib/php/20060613/Optimizer_TS"
;zend_extension="/usr/local/lib/php/20060613/ZendExtensionManager.so"
;zend_extension_ts="/usr/local/lib/php/20060613/ZendExtensionManager_TS.so
;extension = filter.so
php modules are used:
[PHP Modules]
bcmath
bz2
calendar
ctype
curl
date
dom
filter
gd
gettext
hash
iconv
imap
ionCube Loader
json
libxml
mbstring
mcrypt
mhash
mysql
mysqli
openssl
pcre
PDO
pdo_mysql
pdo_sqlite
posix
Reflection
session
SimpleXML
sockets
SPL
SQLite
standard
suhosin
tokenizer
xml
xmlreader
xmlwriter
Zend Optimizer
zip
zlib

[Zend Modules]
Zend Extension Manager
Zend Optimizer
the ionCube PHP Loader

Same probleme

We use php (cgi) and open_basedir > all php scrips > No input file specified.

Error disappears if you disable open_basedir

Just an observation, but ini the php.ini for the affected account, the open_basedir setting has spaces in the paths.

PHP 5.2 is no longer supported; please reopen if this still occurs with PHP 5.3.10 
or 5.4.0RC8.