Maybe it's already been asked, but I didn't find it. On XOOPS 2.0.13.1 after installing Protector 2.52 and after patching mainfile.php, I get a bunch of notices:

Notice [PHP]: Constant XOOPS_SIDEBLOCK_LEFT already defined in file include/common.php line 44
Notice [PHP]: Constant XOOPS_SIDEBLOCK_RIGHT already defined in file include/common.php line 45
Notice [PHP]: Constant XOOPS_SIDEBLOCK_BOTH already defined in file include/common.php line 46
Notice [PHP]: Constant XOOPS_CENTERBLOCK_LEFT already defined in file include/common.php line 47
Notice [PHP]: Constant XOOPS_CENTERBLOCK_RIGHT already defined in file include/common.php line 48
Notice [PHP]: Constant XOOPS_CENTERBLOCK_CENTER already defined in file include/common.php line 49
Notice [PHP]: Constant XOOPS_CENTERBLOCK_ALL already defined in file include/common.php line 50
Notice [PHP]: Constant XOOPS_BLOCK_INVISIBLE already defined in file include/common.php line 51
Notice [PHP]: Constant XOOPS_BLOCK_VISIBLE already defined in file include/common.php line 52
Notice [PHP]: Constant XOOPS_MATCH_START already defined in file include/common.php line 53
Notice [PHP]: Constant XOOPS_MATCH_END already defined in file include/common.php line 54
Notice [PHP]: Constant XOOPS_MATCH_EQUAL already defined in file include/common.php line 55
Notice [PHP]: Constant XOOPS_MATCH_CONTAIN already defined in file include/common.php line 56
Notice [PHP]: Constant SMARTY_DIR already defined in file include/common.php line 57
Notice [PHP]: Constant XOOPS_CACHE_PATH already defined in file include/common.php line 58
Notice [PHP]: Constant XOOPS_UPLOAD_PATH already defined in file include/common.php line 59
Notice [PHP]: Constant XOOPS_THEME_PATH already defined in file include/common.php line 60
Notice [PHP]: Constant XOOPS_COMPILE_PATH already defined in file include/common.php line 61
Notice [PHP]: Constant XOOPS_THEME_URL already defined in file include/common.php line 62
Notice [PHP]: Constant XOOPS_UPLOAD_URL already defined in file include/common.php line 63
Notice [PHP]: Constant XOOPS_DB_CHKREF already defined in file include/common.php line 69
Notice [PHP]: Constant XOOPS_DB_PROXY already defined in file include/common.php line 80
Notice [PHP]: A session had already been started - ignoring session_start() in file include/common.php line 177

Is this something to worry about?

Thanks in advance.