I've retested 1.2.1 (release) at work under previous ubuntu release (edgy) on pentium 4 (32-bit system). At the end I've got "1 of 7 tests failed" too.
In log file I can find only one error:
CODE
testing --skip=# (encode) (raw<->flac)... OK
testing --skip=mm:ss (encode) (raw<->flac)... OK
testing --skip=mm:ss.sss (encode) (raw<->flac)... 50c.skip11.raw z50c.skip0:01.1001.raw differ: char 1, line 1
ERROR: file mismatch for --skip=0:01.1001 (encode) (raw<->flac)
FAIL: ./test_flac.sh
If at amd64 box I'll get another error I'll post about it.