diff --git a/board/msba2-common/drivers/msba2-uart0.c b/board/msba2-common/drivers/msba2-uart0.c
index 31a9870aaf..ccfc6d8e04 100644
--- a/board/msba2-common/drivers/msba2-uart0.c
+++ b/board/msba2-common/drivers/msba2-uart0.c
@@ -202,7 +202,6 @@ bl_uart_init(void)
 
     /* irq */
     install_irq(UART0_INT, UART0_IRQHandler, 6);
-//    U0IER |= BIT0 | BIT1;       // enable RX+TX irq
     U0IER |= BIT0;       // enable only RX irq
     return 1;
 }
diff --git a/core/msg.c b/core/msg.c
index 349caf7c54..acfdceaf96 100644
--- a/core/msg.c
+++ b/core/msg.c
@@ -105,7 +105,7 @@ int msg_send_int(msg_t* m, unsigned int target_pid) {
     tcb_t *target = (tcb_t*)sched_threads[target_pid];
 
     if (target->status ==  STATUS_RECEIVE_BLOCKED) {
-        DEBUG("msg_send_int: direct msg copy.\n");
+        DEBUG("msg_send_int: direct msg copy from %i to %i.\n", thread_getpid(), target_pid);
 
         m->sender_pid = target_pid;
 
diff --git a/drivers/cc110x_ng/cc110x-rx.c b/drivers/cc110x_ng/cc110x-rx.c
index d8299644da..bd4035b96a 100644
--- a/drivers/cc110x_ng/cc110x-rx.c
+++ b/drivers/cc110x_ng/cc110x-rx.c
@@ -14,10 +14,11 @@
 
 #ifdef DBG_IGNORE
 #include <stdio.h>
+#include <string.h>
 #define IGN_MAX     (10)
 
-uint8_t ignored_addr[IGN_MAX];
-static uint8_t is_ignored(uint8_t addr);
+radio_address_t ignored_addr[IGN_MAX];
+static uint8_t is_ignored(radio_address_t addr);
 #endif
 
 static uint8_t receive_packet_variable(uint8_t *rxBuffer, uint8_t length);
@@ -60,6 +61,7 @@ void cc110x_rx_handler(void) {
         
 #ifdef DBG_IGNORE
         if (is_ignored(cc110x_rx_buffer[rx_buffer_next].packet.phy_src)) {
+            LED_RED_TOGGLE;
             return;
         }
 #endif
@@ -114,8 +116,6 @@ static uint8_t receive_packet_variable(uint8_t *rxBuffer, uint8_t length) {
 
 	/* Any bytes available in RX FIFO? */
 	if ((cc110x_read_status(CC1100_RXBYTES) & BYTES_IN_RXFIFO)) {
-        //LED_GREEN_TOGGLE;
-        //LED_RED_TOGGLE;
 		// Read length byte (first byte in RX FIFO)
         cc110x_read_fifo((char*) &packetLength, 1);
 		// Read data from RX FIFO and store in rxBuffer
@@ -153,7 +153,6 @@ static uint8_t receive_packet_variable(uint8_t *rxBuffer, uint8_t length) {
 	}
     /* no bytes in RX FIFO */
 	else {
-        //LED_RED_TOGGLE;
 		// RX FIFO get automatically flushed if return value is false
 		return 0;
 	}
@@ -172,28 +171,23 @@ static uint8_t receive_packet(uint8_t *rxBuffer, uint8_t length) {
 
 #ifdef DBG_IGNORE
 void cc110x_init_ignore(void) {
-    uint8_t i;
-
-    for (i = 0; i < IGN_MAX; i++) {
-        ignored_addr[i] = 0;
-    }
+    memset(ignored_addr, 0, IGN_MAX*sizeof(radio_address_t));
 }
 
-uint8_t cc110x_add_ignored(uint8_t addr) {
+uint8_t cc110x_add_ignored(radio_address_t addr) {
    uint8_t i = 0;
 
    while ((i < IGN_MAX) && ignored_addr[i++]) {
        printf("i: %hu\n", i);
    }
-   printf("Adding %hu to ignore list at position %hu\n", addr, i);
-   if (i >= IGN_MAX) {
+   if (i > IGN_MAX) {
        return 0;
    }
    ignored_addr[i-1] = addr;
    return 1;
 }
 
-static uint8_t is_ignored(uint8_t addr) {
+static uint8_t is_ignored(radio_address_t addr) {
     uint8_t i;
 
     for (i = 0; i < IGN_MAX; i++) {
diff --git a/drivers/cc110x_ng/include/cc110x_ng.h b/drivers/cc110x_ng/include/cc110x_ng.h
index e504a86bde..5774cd5aea 100644
--- a/drivers/cc110x_ng/include/cc110x_ng.h
+++ b/drivers/cc110x_ng/include/cc110x_ng.h
@@ -145,7 +145,7 @@ void cc110x_init_ignore(void);
  * @return      0 if list is full, 1 otherwise
  *
  */
-uint8_t cc110x_add_ignored(uint8_t addr);
+uint8_t cc110x_add_ignored(radio_address_t addr);
 #endif
 
 
diff --git a/sys/chardev_thread.c b/sys/chardev_thread.c
index d307829267..84fb97a3b4 100644
--- a/sys/chardev_thread.c
+++ b/sys/chardev_thread.c
@@ -29,14 +29,16 @@ void chardev_loop(ringbuffer_t *rb) {
     while (1) {
         msg_receive(&m);
 
-        if (m.sender_pid == pid) {
-        } else {
+        if (m.sender_pid != pid) {
+            DEBUG("Receiving message from another thread");
             switch (m.type) {
                 case OPEN:
                     if (reader_pid == -1) {
                         reader_pid = m.sender_pid;
-                        m.content.value = 0; // no error
-                    } else {
+                        /* no error */
+                        m.content.value = 0;
+                    }
+                    else {
                         m.content.value = -EBUSY;
                     }
                     msg_reply(&m,&m);
@@ -44,8 +46,10 @@ void chardev_loop(ringbuffer_t *rb) {
                 case READ:
                     if (m.sender_pid != reader_pid) {
                         m.content.value = -EINVAL;
+                        r = NULL;
                         msg_reply(&m, &m);
-                    } else {
+                    }
+                    else {
                         r = (struct posix_iop_t *)m.content.ptr;
                     }
                     break;
@@ -55,7 +59,8 @@ void chardev_loop(ringbuffer_t *rb) {
                         reader_pid = -1;
                         r = NULL;
                         m.content.value = 0;
-                    } else {
+                    }
+                    else {
                         m.content.value = -EINVAL;
                     }
                     msg_reply(&m,&m);
@@ -69,7 +74,7 @@ void chardev_loop(ringbuffer_t *rb) {
         if (rb->avail && (r != NULL)) {
             int state = disableIRQ();
             int nbytes = min(r->nbytes, rb->avail);
-            DEBUG("uart0_thread: sending %i bytes to pid %i\n", nbytes, reader_pid);
+            DEBUG("uart0_thread [%i]: sending %i bytes received from %i to pid %i\n", pid, nbytes, m.sender_pid, reader_pid);
             rb_get_elements(rb, r->buffer, nbytes);
             r->nbytes = nbytes;
 
@@ -78,7 +83,6 @@ void chardev_loop(ringbuffer_t *rb) {
             m.content.ptr = (char*)r;
 
             msg_reply(&m, &m);
-           // DEBUG("uart0_thread: sending res=%i\n", res);
 
             r = NULL;
             restoreIRQ(state);
diff --git a/sys/shell/shell.c b/sys/shell/shell.c
index efebc5d025..1635f428d4 100644
--- a/sys/shell/shell.c
+++ b/sys/shell/shell.c
@@ -136,7 +136,8 @@ int readline(shell_t *shell, char* buf, int size) {
         if (c == 10) {
             *line_buf_ptr = '\0';
             return 0;
-        } else {
+        }
+        else {
             *line_buf_ptr++ = c;
         }
     }