def parseVer_123(match):
        progname = match.group(1)
-       patchlevel = match.group(5)
+       try:
+               patchlevel = match.group(5)
+       except (IndexError), e:
+               patchlevel = None
        if patchlevel:
                patchlevel = ord(patchlevel[0])
        else:
 
 def parseVer_12(match):
        progname = match.group(1)
-       patchlevel = match.group(4)
+       try:
+               patchlevel = match.group(4)
+       except (IndexError), e:
+               patchlevel = None
        if patchlevel:
                patchlevel = ord(patchlevel[0])
        else:
        (re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)\.(\d+)"), parseVer_1234),     # xxx-1.2.3.4
        (re.compile(r"(.+)[-_](\d\d\d\d)-?(\d\d)-?(\d\d)"), parseVer_ymd),      # xxx-YYYY-MM-DD
        (re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)(\w?)"), parseVer_123),        # xxx-1.2.3a
+       (re.compile(r"(.+)[-_](\d+)_(\d+)_(\d+)"), parseVer_123),               # xxx-1_2_3
        (re.compile(r"(.+)[-_](\d+)\.(\d+)(\w?)"), parseVer_12),                # xxx-1.2a
        (re.compile(r"(.+)[-_]r?(\d+)"), parseVer_r),                           # xxx-r1111
 )
 blacklist = [
        ("linux",               re.compile(r"linux-.*")),
        ("gcc",                 re.compile(r"gcc-.*")),
-       ("boost",               re.compile(r"boost.*")),
        ("wl_apsta",            re.compile(r"wl_apsta.*")),
        (".fw",                 re.compile(r".*\.fw")),
        (".arm",                re.compile(r".*\.arm")),