php "make test" failures

Greetings PHP List, I have run php4 for many years and am finally rolling over to php5. When I compiled php 5.2.6 and ran "make test", I get the following: ===================================================================== FAILED TEST SUMMARY --------------------------------------------------------------------- Bug #16069 (ICONV transliteration failure) [ext/iconv/tests/bug16069.phpt] iconv stream filter [ext/iconv/tests/iconv_stream_filter.phpt] Test array_slice() function : usage variations - Pass different data types as $offset arg [ext/standard/tests/array/array_slice_variation2.phpt] Test array_slice() function : usage variations - Pass different data types as $length arg [ext/standard/tests/array/array_slice_variation3.phpt] Test array_slice() function : usage variations - pass different int values as $length arg [ext/standard/tests/array/array_slice_variation6.phpt] Test closedir() function : usage variations - close a file pointer [ext/standard/tests/dir/closedir_variation3.phpt] Test readdir() function : usage variations - empty directories [ext/standard/tests/dir/readdir_variation2.phpt] Test readdir() function : usage variations - use file pointers [ext/standard/tests/dir/readdir_variation7.phpt] Test rewinddir() function : basic functionality [ext/standard/tests/dir/rewinddir_basic.phpt] Test rewinddir() function : usage variations - operate on a closed directory [ext/standard/tests/dir/rewinddir_variation2.phpt] Test rewinddir() function : usage variations - file pointers [ext/standard/tests/dir/rewinddir_variation3.phpt] ===================================================================== It is running on CentOS5 x86_64 (2.6.18-92.1.13.el5). It seems php5 has more "make test" failures than php4 did - is this normal or should I be concerned? Any help is greatly appreciated. Michael