diff --git a/backend_dnpds40.c b/backend_dnpds40.c
index c56444b..560ff69 100644
--- a/backend_dnpds40.c
+++ b/backend_dnpds40.c
@@ -229,7 +229,7 @@ static struct dnpds40_printjob *combine_jobs(const struct dnpds40_printjob *job1
 
 #if 0
 	// XXX TODO:  2x6*2 + 2x6*2 --> 8x6+cutter!
-	// problem is that 8x6" size is 4 rows smaller than 2* 4x6" prints, posing a problem.
+	// problem is that 8x6" size is 4 rows smaller than 2* 4x6" prints, posing a problem.  Maybe cut off the top and bottom 2 rows?
 
 	/* Only handle cutter if it's for 2x6" strips */
 	if (job1->cutter != 0 && job1->cutter != 120)
@@ -1960,7 +1960,6 @@ top:
 		goto top;
 	case 900:
 		INFO("Waking printer up from standby...\n");
-		// XXX do someting here?
 		break;
 	case 1000: /* Cover open */
 	case 1010: /* No Scrap Box */
@@ -2022,7 +2021,7 @@ top:
 
 			dnpds40_cleanup_string((char*)resp, len);
 
-#if 0  // XXX Fix 600dpi support on CW01
+#if 0  // TODO Fix 600dpi support on CW01
 			// have to read the last DPI, and send the correct CWD over?
 			if (ctx->dpi == 600 && strcmp("RV0334", *char*)resp) {
 				ERROR("600DPI prints not yet supported, need 600DPI CWD load\n");
diff --git a/backend_hiti.c b/backend_hiti.c
index e430413..7678ed6 100644
--- a/backend_hiti.c
+++ b/backend_hiti.c
@@ -2100,6 +2100,7 @@ struct dyesub_backend hiti_backend = {
 /* TODO:
 
    - Figure out 5x6, 6x5, and 6x6 prints (need 6x8 or 6x9 media!)
+   - Confirm 6x2" print dimensions (windows?)
    - Confirm 5" media works properly
    - Figure out stats/counters for non-4x6 sizes
    - Job status & control (QJC, RSJ, QQA)
diff --git a/backend_kodak605.c b/backend_kodak605.c
index 0fb9e4e..f787dea 100644
--- a/backend_kodak605.c
+++ b/backend_kodak605.c
@@ -79,7 +79,7 @@ struct kodak605_status {
 	uint16_t b4_complete;
 	uint16_t b4_total;
 	uint8_t  b4_sts;    /* see BANK_STATUS_* */
-/*@70*/	uint8_t  unk[4];  /* XXX EK605 has 01/00/00/00, EK7000 has 01/01/01/01 */
+/*@70*/	uint8_t  unk[4];  /* EK605 has 01/00/00/00, EK7000 has 01/01/01/01 */
 /*@74*/	uint8_t  null_2[2]; /* 00 00 */
 /*@76*/	uint8_t  null_3[1]; /* EK7000 only */
 } __attribute__((packed));
@@ -552,7 +552,7 @@ static int kodak605_main_loop(void *vctx, const void *vjob) {
 			return ret;
 		}
 		offset += 44;
-		// XXX sanity check backpriny parameters..
+		// XXX sanity check backprint parameters..
 	}
 
 	/* Send print job */
diff --git a/backend_kodak6800.c b/backend_kodak6800.c
index dbc4835..20f7572 100644
--- a/backend_kodak6800.c
+++ b/backend_kodak6800.c
@@ -602,13 +602,6 @@ static int kodak6850_send_unk(struct kodak6800_ctx *ctx)
 		return CUPS_BACKEND_FAILED;
 	}
 
-#if 0
-	// XXX No particular idea what this actually is
-	if (rdbuf[1] != 0x01 && rdbuf[1] != 0x00) {
-		ERROR("Unexpected status code (0x%02x)!\n", rdbuf[1]);
-		return CUPS_BACKEND_FAILED;
-	}
-#endif
 	return ret;
 }
 
diff --git a/backend_mitsu70x.c b/backend_mitsu70x.c
index e68557d..7553357 100644
--- a/backend_mitsu70x.c
+++ b/backend_mitsu70x.c
@@ -342,7 +342,7 @@ struct mitsu70x_printerstatus_resp {
 	int16_t  serno[6]; /* LE, UTF-16 */
 	struct mitsu70x_status_ver vers[7]; // components are 'MLRTF'
 	uint8_t  null[2];
-	uint8_t  user_serno[6];  /* XXX Supposedly, don't know how to set it */
+	uint8_t  user_serno[6];  /* XXX Supposedly. Don't know how to set it! */
 	struct mitsu70x_status_deck lower;
 	struct mitsu70x_status_deck upper;
 } __attribute__((packed));
@@ -1160,8 +1160,8 @@ repeat:
 			mhdr.hdr[3] = 0x90;
 		}
 	} else if (ctx->type == P_FUJI_ASK300) {
-		job->laminatefname = CORRTABLE_PATH "/ASK300M2.raw"; // Same as D70
-//		job->lutfname = CORRTABLE_PATH "/CPD70L01.lut";  // XXX guess, driver did not come with external LUT!
+		job->laminatefname = CORRTABLE_PATH "/ASK300M2.raw"; /* Same as D70 */
+		job->lutfname = NULL; /* Printer does not come with external LUT */
 		if (mhdr.speed == 3 || mhdr.speed == 4) {
 			mhdr.speed = 3; /* Super Fine */
 			job->cpcfname = CORRTABLE_PATH "/ASK300T3.cpc";
@@ -1718,8 +1718,7 @@ static int mitsu70x_main_loop(void *vctx, const void *vjob)
 	int copies;
 	int deck, legal, reqdeck;
 
-	struct mitsu70x_printjob *job = (struct mitsu70x_printjob *) vjob; // XXX not clean.
-//	const struct mitsu70x_printjob *job = vjob;
+	struct mitsu70x_printjob *job = (struct mitsu70x_printjob *) vjob;
 
 	if (!ctx)
 		return CUPS_BACKEND_FAILED;
diff --git a/backend_mitsu9550.c b/backend_mitsu9550.c
index 76beff1..331b93c 100644
--- a/backend_mitsu9550.c
+++ b/backend_mitsu9550.c
@@ -1060,7 +1060,8 @@ static int validate_media(int type, int media, int cols, int rows)
 		}
 		break;
 	case P_MITSU_9800:
-	case P_MITSU_9810: // XXX and don't forget the 9820S
+	case P_MITSU_9810:
+//	case P_MITSU_9820S:
 		switch(media & 0xf) {
 		case 0x01: /* 3.5x5 */
 			if (cols != 1572 && rows != 1076)
@@ -1140,8 +1141,7 @@ static int mitsu9550_main_loop(void *vctx, const void *vjob) {
 	int copies = 1;
 #endif
 
-//	const struct mitsu9550_printjob *job = vjob;
-	struct mitsu9550_printjob *job = (struct mitsu9550_printjob*) vjob; // XXX not good.
+	struct mitsu9550_printjob *job = (struct mitsu9550_printjob*) vjob;
 
 	if (!ctx)
 		return CUPS_BACKEND_FAILED;
@@ -1151,13 +1151,6 @@ static int mitsu9550_main_loop(void *vctx, const void *vjob) {
 	/* Okay, let's do this thing */
 	ptr = job->databuf;
 
-#if 0
-	/* If hdr2 is not present, we have to generate copies ourselves! */
-	if (!job->hdr2_present)
-		copies = job->copies;
-	// XXX..
-#endif
-
 	/* Do the 98xx processing here */
 	if (!ctx->is_98xx || job->is_raw)
 		goto bypass;
diff --git a/backend_mitsud90.c b/backend_mitsud90.c
index 2ff049c..70d8abe 100644
--- a/backend_mitsud90.c
+++ b/backend_mitsud90.c
@@ -992,8 +992,7 @@ int mitsud90_get_info(struct mitsud90_ctx *ctx)
 	INFO("TYPE_83: %02x\n", resp.x83);
 	INFO("TYPE_84: %02x\n", resp.x84);
 
-	/* XXX Dump iSerial, sleep time settings */
-	// XXX what about resume, wait time, "cut limit" ?
+	// XXX what about resume, wait time, "cut limit", sleep time ?
 
 	return CUPS_BACKEND_OK;
 }
diff --git a/backend_mitsup95d.c b/backend_mitsup95d.c
index 5ac38bf..e1abf02 100644
--- a/backend_mitsup95d.c
+++ b/backend_mitsup95d.c
@@ -320,7 +320,7 @@ top:
 		}
 	} else if (ptr == job->ftr) {
 
-		/* XXX Update unknown header field to match sniffs */
+		/* Update unknown header field to match sniffs */
 		if (ctx->type == P_MITSU_P95D) {
 			if (job->hdr1[18] == 0x00)
 				job->hdr1[18] = 0x01;