I have installed Civicrm Rebux on our test system
This seemed to install fine, no errors reported - however when clicking on it (under reports) I get a white screen of death).
On checking error logs I see this report
AH01071: Got error 'PHP message: PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 4104 bytes) in MYDOMMAIN.COM/administrator/components/com_civicrm/civicrm/CRM/Core/DAO.php on line 1372\n', referer: http://MYDOMMAIN.COM/administrator/index.php?option=com_civicrm
So it looks like it hit the PHP memory_limit of 128MB.
I upped the memory_limit to 256MB (the highest I can go to) and then got the message:
AH01071: Got error 'PHP message: PHP Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 65552 bytes) in MYDOMAIN.COM/administrator/components/com_civicrm/civicrm/CRM/Core/DAO.php on line 1372\n', referer: http://MYDOMAIN.COM/administrator/index.php?option=com_civicrm