Warning: session_start() [function.session-start]: The session id cont

[Guest doppelganger08]

Hi All,

We have just migrated from one hosting provider to another, site works great but every now and again we get this error on top of the page:

Warning: session_start() [function.session-start]: The session id contains invalid characters, valid characters are only a-z, A-Z and 0-9 in /home/gamesemp/public_html/includes/sessionStart.inc.php on line 39

and these two at the end of the page:

Warning: Unknown(): The session id contains invalid characters, valid characters are only a-z, A-Z and 0-9 in Unknown on line 0

Warning: Unknown(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0

The old provider used php 4.4 & the new uses 5.0 (but I tested the app on 5.0 on our localhost test server....) our site is www.gamesempire.com.au

It happens every now and again when a new session id is assigned, e.g. new browser opened.

Any ideas? I have spent all day looking through the forums, also a search of google with the above error shows a LOT of cubecart apps with this error occuring on certain pages!!