Index: src/OFStreamObserver.h
==================================================================
--- src/OFStreamObserver.h
+++ src/OFStreamObserver.h
@@ -57,10 +57,12 @@
 - (void)streamDidReceiveException: (OFStream*)stream;
 @end
 
 /**
  * \brief A class that can observe multiple streams at once.
+ *
+ * Note: Currently, it can only observe sockets on Win32.
  */
 @interface OFStreamObserver: OFObject
 {
 	OFMutableArray *readStreams;
 	OFMutableArray *writeStreams;

Index: src/OFStreamObserver.m
==================================================================
--- src/OFStreamObserver.m
+++ src/OFStreamObserver.m
@@ -276,10 +276,16 @@
 		if (fds_c[i].revents & POLLOUT) {
 			num = [OFNumber numberWithInt: fds_c[i].fd];
 			stream = [fdToStream objectForKey: num];
 			[delegate streamDidBecomeReadyForReading: stream];
 		}
+
+		if (fds_c[i].revents & POLLERR) {
+			num = [OFNumber numberWithInt: fds_c[i].fd];
+			stream = [fdToStream objectForKey: num];
+			[delegate streamDidReceiveException: stream];
+		}
 
 		fds_c[i].revents = 0;
 	}
 #else
 # ifdef FD_COPY
@@ -299,10 +305,20 @@
 	for (i = 0; i < count; i++) {
 		int fd = [cArray[i] fileDescriptor];
 
 		if (FD_ISSET(fd, &readfds_))
 			[delegate streamDidBecomeReadyForReading: cArray[i]];
+
+		if (FD_ISSET(fd, &exceptfds_)) {
+			[delegate streamDidReceiveException: cArray[i]];
+
+			/*
+			 * Prevent calling it twice in case the fd is in both
+			 * sets.
+			 */
+			FD_CLR(fd, &exceptfds_);
+		}
 	}
 
 	cArray = [writeStreams cArray];
 	count = [writeStreams count];
 
@@ -309,10 +325,13 @@
 	for (i = 0; i < count; i++) {
 		int fd = [cArray[i] fileDescriptor];
 
 		if (FD_ISSET(fd, &writefds_))
 			[delegate streamDidBecomeReadyForWriting: cArray[i]];
+
+		if (FD_ISSET(fd, &exceptfds_))
+			[delegate streamDidReceiveException: cArray[i]];
 	}
 #endif
 
 	[pool release];