Too Many Links
enum {
XENIX_LINK_MAX = 126, /* ?? / SYSV_LINK_MAX = 126, / 127? 251? / V7_LINK_MAX = 126, / ?? */ COH_LINK_MAX = 10000,
};
(for maximum unsigned integer on the system).
This could be caused by a directory having too many files in it (each takes 1 link entry in the directory's i_node) or possibly filesystem corruption.
lib/main.php:944: Notice: PageInfo: Cannot find action page