Looks like it was 6.3.0-1 that I was remembering, it's far, far pickier:
Code:
act.informative.c: In function ‘do_who’:
act.informative.c:1295:7: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
       if (d->original)
       ^~
act.informative.c:1298:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’
         if (d->connected == CON_OEDIT)
         ^~
act.informative.c: In function ‘do_toggle’:
act.informative.c:2047:3: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
   for (toggle = 0; *tog_messages[toggle].command != '\n'; toggle++)
   ^~~
act.informative.c:2051:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’
     if (*tog_messages[toggle].command == '\n' || tog_messages[toggle].min_level > GET_LEVEL(ch)) {
     ^~
act.informative.c:2161:7: warning: this ‘else’ clause does not guard... [-Wmisleading-indentation]
     } else
       ^~~~
act.informative.c:2163:7: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘else’
       break;
       ^~~~~
act.informative.c:2170:7: warning: this ‘else’ clause does not guard... [-Wmisleading-indentation]
     } else
       ^~~~
act.informative.c:2172:7: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘else’
       break;
       ^~~~~
act.informative.c:2187:7: warning: this ‘else’ clause does not guard... [-Wmisleading-indentation]
     } else
       ^~~~
act.informative.c:2189:7: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘else’
       break;
       ^~~~~
dg_olc.c: In function ‘trigedit_parse’:
dg_olc.c:499:12: warning: this ‘else’ clause does not guard... [-Wmisleading-indentation]
          } else
            ^~~~
dg_olc.c:501:12: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘else’
            return;
            ^~~~~~
modify.c: In function ‘playing_string_cleanup’:
modify.c:254:7: warning: this ‘else’ clause does not guard... [-Wmisleading-indentation]
     } else
       ^~~~
modify.c:256:7: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘else’
       free(*d->str);
       ^~~~
act.wizard.c: In function ‘do_zcheck’:
act.wizard.c:3639:9: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
         if (MOB_FLAGGED(mob, MOB_SPEC) && (found = 1))
         ^~
act.wizard.c:3644:11: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’
           if (found) {
           ^~
act.wizard.c: In function ‘obj_checkload’:
act.wizard.c:3955:11: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
           if (ZCMD2.arg1 == ornum)
           ^~
act.wizard.c:3962:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’
             break;
             ^~~~~
prefedit.c: In function ‘do_oasis_prefedit’:
prefedit.c:942:9: warning: this ‘else’ clause does not guard... [-Wmisleading-indentation]
         else
         ^~~~
prefedit.c:944:11: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘else’
           act(buf, FALSE, ch, 0, vict, TO_CHAR);
           ^~~
sedit.c: In function ‘sedit_parse’:
sedit.c:745:5: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
     if (i >= 0)
     ^~
sedit.c:747:7: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’
       sedit_rooms_menu(d);
       ^~~~~~~~~~~~~~~~
aedit.c: In function ‘do_oasis_aedit’:
aedit.c:42:3: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
   if (IS_NPC(ch) || !ch->desc || STATE(ch->desc) != CON_PLAYING)
   ^~
aedit.c:45:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’
     if (CONFIG_NEW_SOCIALS == 0) {
     ^~
spell_parser.c: In function ‘mag_objectmagic’:
spell_parser.c:409:3: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
   if (!consume_otrigger(obj, ch, OCMD_QUAFF))  /* check trigger */
   ^~
spell_parser.c:412:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’
     act("You quaff $p.", FALSE, ch, obj, NULL, TO_CHAR);
     ^~~
dg_scripts.c: In function ‘do_stat_trigger’:
dg_scripts.c:792:7: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
       if (cmd_list->cmd)
       ^~
dg_scripts.c:795:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’
         if (len>MAX_STRING_LENGTH-80) {
         ^~
 
Erkle mentioned ingame that colors weren't working properly in room descriptions. I tested it a bit, it appears as if they do, but only after a copyover or other form of reboot. They're not being parsed as color when read from memory, but are being saved and read from file properly.