diff --git a/doc/issues/0000tn5.rst b/doc/issues/0000tn5.rst
new file mode 100644
index 0000000..6d24376
--- /dev/null
+++ b/doc/issues/0000tn5.rst
@@ -0,0 +1,9 @@
+Add unit tests.
+===============
+
+----
+
+=========  ==========
+Created:   2011-06-28
+Resolved:  YYYY-MM-DD
+=========  ==========
diff --git a/lib/runtime/jar/signpost-commonshttp4-1.2.1.1.jar b/lib/runtime/jar/signpost-commonshttp4-1.2.1.1.jar
deleted file mode 100644
index e8dae4d..0000000
Binary files a/lib/runtime/jar/signpost-commonshttp4-1.2.1.1.jar and /dev/null differ
diff --git a/lib/runtime/jar/signpost-core-1.2.1.1.jar b/lib/runtime/jar/signpost-core-1.2.1.1.jar
deleted file mode 100644
index 86e9dac..0000000
Binary files a/lib/runtime/jar/signpost-core-1.2.1.1.jar and /dev/null differ
diff --git a/release/timestamper-lib-1.1.jar b/release/timestamper-lib-1.1.jar
deleted file mode 100644
index 7aca496..0000000
Binary files a/release/timestamper-lib-1.1.jar and /dev/null differ
diff --git a/release/timestamper-lib-1.2.jar b/release/timestamper-lib-1.2.jar
new file mode 100644
index 0000000..8948848
Binary files /dev/null and b/release/timestamper-lib-1.2.jar differ
diff --git a/src/main/com/jdblabs/timestamper/core/JDBLabsWebTimelineSource.groovy b/src/main/com/jdblabs/timestamper/core/JDBLabsWebTimelineSource.groovy
index 7175455..05f2be1 100644
--- a/src/main/com/jdblabs/timestamper/core/JDBLabsWebTimelineSource.groovy
+++ b/src/main/com/jdblabs/timestamper/core/JDBLabsWebTimelineSource.groovy
@@ -37,9 +37,20 @@ public class JDBLabsWebTimelineSource extends TimelineSource {
         password = config.getProperty(CONFIG_PWD, "")
         timelineId = config.getProperty(CONFIG_TIMELINE, "")
 
-        baseUri = new URI(uri.scheme + "://" + uri.authority)
+        baseUri = new URI(uri.scheme + "://" + uri.authority + "/ts_api/")
         http = new HTTPBuilder(baseUri)
 
+        // set some default error handlers
+        http.handler.'500' = { resp, json ->
+            throw new IOException("The web timeline reported an internal " +
+                "error: ${json.error ?: 'no details available'}") }
+
+        http.handler.failure = {resp, json ->
+            throw new IOException("Unable to complete the operation: error " +
+                "communicating to the web timeline.\n" +
+                "${resp.statusLine}: ${json}") }
+
+        // init our hash of known entries
         entryHashes = [:]
     }
 
@@ -53,9 +64,15 @@ public class JDBLabsWebTimelineSource extends TimelineSource {
         authenticate()
 
         // load the timeline information
-        timelineJSON = http.get(
-            path: "/ts_api/timelines/${username}/${timelineId}",
-            contentType: JSON) { resp, json -> json }
+        http.request(GET, JSON) {
+            uri.path = "timelines/${username}/${timelineId}"
+
+            response.'404' = { resp ->
+                throw new IOException("No timeline '${timelineId}' for user " +
+                    "'${username}'") }
+
+            response.success = { resp, json -> timelineJSON = json }
+        }
 
         timeline = new Timeline()
 
@@ -68,7 +85,7 @@ public class JDBLabsWebTimelineSource extends TimelineSource {
 
         // load the timeline entries
         entryListJSON = http.get(
-            path: "/ts_api/entries/${username}/${timelineId}",
+            path: "entries/${username}/${timelineId}",
             contentType: JSON,
             query: [
                 byDate: true,
@@ -115,11 +132,11 @@ public class JDBLabsWebTimelineSource extends TimelineSource {
         // delete all entries that used to be present but are not any longer
         deletedEntries.each { hash, entryId ->
             http.request(DELETE) {
-                uri.path = "/ts_api/entries/${username}/${timelineId}/${entryId}"
-            }
+                uri.path = "entries/${username}/${timelineId}/${entryId}"
 
-            // TODO: error handling, make sure this only happens on success
-            entryHashes.remove(hash)
+                response.'404' = { resp -> entryHashes.remove(hash) }
+                response.success = { resp -> entryHashes.remove(hash) }
+            }
         }
 
         // add all new entries
@@ -131,32 +148,30 @@ public class JDBLabsWebTimelineSource extends TimelineSource {
                 timestamp: isoDateFormat.format(entry.timestamp)
             ]
 
-            // TODO: error handling
-            http.post(
-                path: "/ts_api/entries/${username}/${timelineId}",
-                contentType: JSON,
-                requestContentType: JSON,
-                body: entryBody) { resp, json ->
-                    entryHashes.put(fullHash(entry), entry)
-                    json
+            http.request(POST, JSON) {
+                uri.path = "entries/${username}/${timelineId}"
+                requestContentType = JSON
+                body = entryBody
+
+                response.success = { entryHashes.put(fullHash(entry), entry.id) }
             }
         }
-
     }
 
-    public boolean isAuthenticated() {
-        // TODO
-    }
+    public boolean isAuthenticated() { return false; }
 
-    public void authenticate() {
-        // TODO: error detection
-        http.post(
-            path: '/ts_api/login',
-            contentType: JSON,
-            requestContentType: JSON,
-            body: [ username: this.username,
-                    password: this.password ]) { resp, json -> json }
+    public void authenticate() throws AuthenticationException {
+        http.request(POST, JSON) { req ->
+            uri.path = '/ts_api/login'
+            requestContentType = JSON
+            body = [ username: this.username,
+                    password: this.password ]
 
+            response.'401' = { resp ->
+                throw new AuthenticationException(
+                    "Unable to connect to ${baseUri}: " +
+                    "Invalid username/password combination.") }
+        }
     }
 
     protected int fullHash(TimelineMarker tm) {