diff --git a/object-handlers.go b/object-handlers.go
index 1bec39ad1..f285d57c9 100644
--- a/object-handlers.go
+++ b/object-handlers.go
@@ -156,6 +156,7 @@ func (api CloudStorageAPI) PutObjectHandler(w http.ResponseWriter, req *http.Req
 		var err error
 		sizeInt64, err = strconv.ParseInt(size, 10, 64)
 		if err != nil {
+			errorIf(probe.NewError(err), "Parsing Content-Length failed.", nil)
 			writeErrorResponse(w, req, InvalidRequest, req.URL.Path)
 			return
 		}
@@ -289,6 +290,7 @@ func (api CloudStorageAPI) PutObjectPartHandler(w http.ResponseWriter, req *http
 		var err error
 		sizeInt64, err = strconv.ParseInt(size, 10, 64)
 		if err != nil {
+			errorIf(probe.NewError(err), "Parsing Content-Length failed.", nil)
 			writeErrorResponse(w, req, InvalidRequest, req.URL.Path)
 			return
 		}
diff --git a/pkg/fs/definitions.go b/pkg/fs/definitions.go
index e9eb34b3b..6abb7b077 100644
--- a/pkg/fs/definitions.go
+++ b/pkg/fs/definitions.go
@@ -165,9 +165,12 @@ func IsValidBucketACL(acl string) bool {
 	}
 }
 
-// IsValidBucket - verify bucket name in accordance with
+// IsValidBucketName - verify bucket name in accordance with
 //  - http://docs.aws.amazon.com/AmazonS3/latest/dev/UsingBucket.html
-func IsValidBucket(bucket string) bool {
+func IsValidBucketName(bucket string) bool {
+	if strings.TrimSpace(bucket) == "" {
+		return false
+	}
 	if len(bucket) < 3 || len(bucket) > 63 {
 		return false
 	}
@@ -178,7 +181,7 @@ func IsValidBucket(bucket string) bool {
 		return false
 	}
 	// We don't support buckets with '.' in them
-	match, _ := regexp.MatchString("^[a-zA-Z][a-zA-Z0-9\\-]+[a-zA-Z0-9]$", bucket)
+	match, _ := regexp.MatchString("^[a-zA-Z0-9][a-zA-Z0-9\\-]+[a-zA-Z0-9]$", bucket)
 	return match
 }
 
diff --git a/pkg/fs/fs-bucket-listobjects.go b/pkg/fs/fs-bucket-listobjects.go
index d3d3079ef..323aba12c 100644
--- a/pkg/fs/fs-bucket-listobjects.go
+++ b/pkg/fs/fs-bucket-listobjects.go
@@ -31,7 +31,7 @@ import (
 func (fs Filesystem) ListObjects(bucket string, resources BucketResourcesMetadata) ([]ObjectMetadata, BucketResourcesMetadata, *probe.Error) {
 	fs.lock.Lock()
 	defer fs.lock.Unlock()
-	if !IsValidBucket(bucket) {
+	if !IsValidBucketName(bucket) {
 		return nil, resources, probe.NewError(BucketNameInvalid{Bucket: bucket})
 	}
 	if resources.Prefix != "" && IsValidObjectName(resources.Prefix) == false {
diff --git a/pkg/fs/fs-bucket.go b/pkg/fs/fs-bucket.go
index f0e6e50bb..1fd2b8f43 100644
--- a/pkg/fs/fs-bucket.go
+++ b/pkg/fs/fs-bucket.go
@@ -33,7 +33,7 @@ func (fs Filesystem) DeleteBucket(bucket string) *probe.Error {
 	fs.lock.Lock()
 	defer fs.lock.Unlock()
 	// verify bucket path legal
-	if !IsValidBucket(bucket) {
+	if !IsValidBucketName(bucket) {
 		return probe.NewError(BucketNameInvalid{Bucket: bucket})
 	}
 	bucketDir := filepath.Join(fs.path, bucket)
@@ -78,7 +78,7 @@ func (fs Filesystem) ListBuckets() ([]BucketMetadata, *probe.Error) {
 		}
 		if file.IsDir() {
 			// if directories found with odd names, skip them too
-			if !IsValidBucket(file.Name()) {
+			if !IsValidBucketName(file.Name()) {
 				continue
 			}
 		}
@@ -108,7 +108,7 @@ func (fs Filesystem) MakeBucket(bucket, acl string) *probe.Error {
 	}
 
 	// verify bucket path legal
-	if !IsValidBucket(bucket) {
+	if !IsValidBucketName(bucket) {
 		return probe.NewError(BucketNameInvalid{Bucket: bucket})
 	}
 
@@ -157,7 +157,7 @@ func (fs Filesystem) MakeBucket(bucket, acl string) *probe.Error {
 func (fs Filesystem) GetBucketMetadata(bucket string) (BucketMetadata, *probe.Error) {
 	fs.lock.Lock()
 	defer fs.lock.Unlock()
-	if !IsValidBucket(bucket) {
+	if !IsValidBucketName(bucket) {
 		return BucketMetadata{}, probe.NewError(BucketNameInvalid{Bucket: bucket})
 	}
 	// get bucket path
@@ -184,7 +184,7 @@ func (fs Filesystem) GetBucketMetadata(bucket string) (BucketMetadata, *probe.Er
 func (fs Filesystem) SetBucketMetadata(bucket string, metadata map[string]string) *probe.Error {
 	fs.lock.Lock()
 	defer fs.lock.Unlock()
-	if !IsValidBucket(bucket) {
+	if !IsValidBucketName(bucket) {
 		return probe.NewError(BucketNameInvalid{Bucket: bucket})
 	}
 	acl := metadata["acl"]
diff --git a/pkg/fs/fs-multipart.go b/pkg/fs/fs-multipart.go
index 00fc18632..024d43948 100644
--- a/pkg/fs/fs-multipart.go
+++ b/pkg/fs/fs-multipart.go
@@ -56,7 +56,7 @@ func (fs Filesystem) isValidUploadID(object, uploadID string) bool {
 func (fs Filesystem) ListMultipartUploads(bucket string, resources BucketMultipartResourcesMetadata) (BucketMultipartResourcesMetadata, *probe.Error) {
 	fs.lock.Lock()
 	defer fs.lock.Unlock()
-	if !IsValidBucket(bucket) {
+	if !IsValidBucketName(bucket) {
 		return BucketMultipartResourcesMetadata{}, probe.NewError(BucketNameInvalid{Bucket: bucket})
 	}
 	bucketPath := filepath.Join(fs.path, bucket)
@@ -153,7 +153,7 @@ func (fs Filesystem) NewMultipartUpload(bucket, object string) (string, *probe.E
 		return "", probe.NewError(RootPathFull{Path: fs.path})
 	}
 
-	if !IsValidBucket(bucket) {
+	if !IsValidBucketName(bucket) {
 		return "", probe.NewError(BucketNameInvalid{Bucket: bucket})
 	}
 	if !IsValidObjectName(object) {
@@ -234,7 +234,7 @@ func (fs Filesystem) CreateObjectPart(bucket, object, uploadID, expectedMD5Sum s
 		return "", probe.NewError(errors.New("invalid part id, cannot be zero or less than zero"))
 	}
 	// check bucket name valid
-	if !IsValidBucket(bucket) {
+	if !IsValidBucketName(bucket) {
 		return "", probe.NewError(BucketNameInvalid{Bucket: bucket})
 	}
 
@@ -344,7 +344,7 @@ func (fs Filesystem) CompleteMultipartUpload(bucket, object, uploadID string, da
 	defer fs.lock.Unlock()
 
 	// check bucket name valid
-	if !IsValidBucket(bucket) {
+	if !IsValidBucketName(bucket) {
 		return ObjectMetadata{}, probe.NewError(BucketNameInvalid{Bucket: bucket})
 	}
 
@@ -446,7 +446,7 @@ func (fs Filesystem) ListObjectParts(bucket, object string, resources ObjectReso
 	defer fs.lock.Unlock()
 
 	// check bucket name valid
-	if !IsValidBucket(bucket) {
+	if !IsValidBucketName(bucket) {
 		return ObjectResourcesMetadata{}, probe.NewError(BucketNameInvalid{Bucket: bucket})
 	}
 
@@ -515,7 +515,7 @@ func (fs Filesystem) AbortMultipartUpload(bucket, object, uploadID string) *prob
 	defer fs.lock.Unlock()
 
 	// check bucket name valid
-	if !IsValidBucket(bucket) {
+	if !IsValidBucketName(bucket) {
 		return probe.NewError(BucketNameInvalid{Bucket: bucket})
 	}
 
diff --git a/pkg/fs/fs-object.go b/pkg/fs/fs-object.go
index 1369db05b..7ed4cc430 100644
--- a/pkg/fs/fs-object.go
+++ b/pkg/fs/fs-object.go
@@ -43,7 +43,7 @@ func (fs Filesystem) GetObject(w io.Writer, bucket, object string, start, length
 	defer fs.lock.Unlock()
 
 	// validate bucket
-	if !IsValidBucket(bucket) {
+	if !IsValidBucketName(bucket) {
 		return 0, probe.NewError(BucketNameInvalid{Bucket: bucket})
 	}
 
@@ -96,7 +96,7 @@ func (fs Filesystem) GetObjectMetadata(bucket, object string) (ObjectMetadata, *
 	fs.lock.Lock()
 	defer fs.lock.Unlock()
 
-	if !IsValidBucket(bucket) {
+	if !IsValidBucketName(bucket) {
 		return ObjectMetadata{}, probe.NewError(BucketNameInvalid{Bucket: bucket})
 	}
 
@@ -182,7 +182,7 @@ func (fs Filesystem) CreateObject(bucket, object, expectedMD5Sum string, size in
 	}
 
 	// check bucket name valid
-	if !IsValidBucket(bucket) {
+	if !IsValidBucketName(bucket) {
 		return ObjectMetadata{}, probe.NewError(BucketNameInvalid{Bucket: bucket})
 	}
 	// check bucket exists
@@ -304,7 +304,7 @@ func (fs Filesystem) DeleteObject(bucket, object string) *probe.Error {
 	defer fs.lock.Unlock()
 
 	// check bucket name valid
-	if !IsValidBucket(bucket) {
+	if !IsValidBucketName(bucket) {
 		return probe.NewError(BucketNameInvalid{Bucket: bucket})
 	}