After upgrading from Leopard to Snow Leopard i have the same problem (i think it has something to do with the PHP version 5.3.0)
I was using RoundCube version 2.1
My error on the front page is: (also no login screen)
.../program/lib/iniset.php on line 63
.../program/lib/PEAR.php on line 563
.../program/lib/PEAR.php on line 566
Roundcube was working great on my OSX (Leopard) but after the upgrade to Snow Leopard it stopt working.
No login screen anymore and when i remove the .htaccess it gave me the errors you can see above.
Reinstalled MySQL (new database) no sollution. Used the Roundcube 3 beta, here is some differents, i can see the login screen again, its not working because i got an error about Roundcube cant use cookies, but my configuration is able to accept cookies.
The Installer pages result also in error:
main.inc.php: OK
db.inc.php: OK
Check if directories are writable
RoundCube may need to write/save files into these directories
temp/: OK
logs/: OK
Check configured database settings
Deprecated: Assigning the return value of new by reference is deprecated in /Users/xxx/Sites/rc/program/lib/MDB2.php on line 392
Deprecated: Assigning the return value of new by reference is deprecated in /Users/xxx/Sites/rc/program/lib/MDB2.php on line 2613
Deprecated: Assigning the return value of new by reference is deprecated in /Users/xxx/Sites/rc/program/lib/PEAR.php on line 563
Deprecated: Assigning the return value of new by reference is deprecated in /Users/xxx/Sites/rc/program/lib/PEAR.php on line 566
DSN (write): OK
DB Schema: OK
DB Write: OK
DB Time: OK
Hope someone can help me...
Thanks in advance,
Mike