diff --git a/common.gradle b/common.gradle
index 827d27d67..600718ca7 100644
--- a/common.gradle
+++ b/common.gradle
@@ -34,7 +34,7 @@ ext {
     jme3utilitiesheartVersion = '2.12.0'
     jme3utilitiesniftyVersion = '0.8.2'
     jme3utilitiesuiVersion = '0.6.5'
-    jme3utilitiesxVersion = '0.2.5'
+    jme3utilitiesxVersion = '0.2.6'
     jmonkeyengineVersion = '3.2.1-stable'
     minieVersion = '0.4.4'
     skycontrolVersion = '0.9.14'
diff --git a/heart/release-notes.md b/heart/release-notes.md
index 24cd44e1a..8d47c27db 100644
--- a/heart/release-notes.md
+++ b/heart/release-notes.md
@@ -5,7 +5,7 @@
  + Added a `findIndex()` method for scene-graph controls to
    the `MySpatial` class.
  + Added a `mean()` method to the `MyVector3f` class.
- + Added nonEmpty() methods for Object arrays and collections to
+ + Added `nonEmpty()` methods for Object arrays and collections to
    the `Validate` class
  + Allow for negative bone weights in animated meshes.
 
diff --git a/ui/release-notes.md b/ui/release-notes.md
index 0c6f2ed19..aedb3472c 100644
--- a/ui/release-notes.md
+++ b/ui/release-notes.md
@@ -2,20 +2,20 @@
 
 ## Version 0.6.5 released on 23 September 2018
 
- + Renamed UiVersion.getVersionShort() to versionShort(). (API change)
- + Based on version 2.10 of the heart library.
+ + Renamed `UiVersion.getVersionShort()` to `versionShort()`. (API change)
+ + Based on version 2.10 of the jme3-utilities-heart library.
 
 ## Version 0.6.4 released on 17 August 2018
 
-Based on version 2.6 of the heart library.
+Based on version 2.6 of the jme3-utilities-heart library.
 
 ## Version 0.6.3 released on 24 July 2018
 
-Based on version 2.5 of the heart library.
+Based on version 2.5 of the jme3-utilities-heart library.
 
 ## Version 0.6.2 released on 2 February 2018
 
-Based on version 2.2 of the heart library.
+Based on version 2.2 of the jme3-utilities-heart library.
 
 ## Version 0.6.1 released on 25 January 2018
 
@@ -24,20 +24,20 @@ Based on heart library v2.0 to make this library physics-independent.
 ## Version 0.6.0for32 released on 5 December 2017
 
  + 1st release to target JME 3.2
- + Replaced PropertiesKey with UncachedKey.
- + Simplified InputMode by removing the unused "stream" variable.
+ + Replaced `PropertiesKey` with `UncachedKey`.
+ + Simplified `InputMode` by removing the unused `stream` variable.
 
 ## Version 0.5.9 released on 13 September 2017
 
- + Changed semantics of the Locators.register(List) method.
+ + Changed semantics of the` Locators.register(List)` method.
  + Tried to avoid registering duplicate locators.
  + Added support for HttpZip and Url locators.
  + Standardized the BSD license texts.
 
 ## Version 0.5.8 released on 11 August 2017
 
- + Refined the API of Locators class.
- + Implemented save/restore for Locators.
+ + Refined the API of `Locators` class.
+ + Implemented save/restore for `Locators`.
 
 ## Version 0.5.7 released on 9 August 2017
 
@@ -45,13 +45,13 @@ Based on heart library v2.0 to make this library physics-independent.
 
 ## Version 0.5.6 released on 7 August 2017
 
-+ Protected flycamNames from external modification.
++ Protected `flycamNames` from external modification.
 + Improved handling of filesystem exceptions.
 + Added several registration methods to the Locators class.
 
 ## Version 0.5.5 released on 16 July 2017
 
-Publicized InputMode.activate() and InputMode.deactivate() so they can be
+Publicized `InputMode.activate()` and `InputMode.deactivate()` so they can be
 overriden.
 
 ## Version 0.5.4 released on 15 July 2017
diff --git a/x/build.gradle b/x/build.gradle
index 575b3c91a..4073cf55e 100644
--- a/x/build.gradle
+++ b/x/build.gradle
@@ -9,16 +9,16 @@ ext {
     baseName = "$artifact-$version"
 }
 
-build { dependsOn 'pom' }
 jar { baseName project.ext.baseName }
 javadocJar { baseName project.ext.baseName }
 sourcesJar { baseName project.ext.baseName }
 
 dependencies {
-    //compile "jme3utilities:jme3-utilities-heart:$jme3utilitiesheartVersion"
-    compile project(':heart')
+    compile "jme3utilities:jme3-utilities-heart:$jme3utilitiesheartVersion"
+    //compile project(':heart')
 }
 
+build.dependsOn('pom')
 task pom {
     doLast {
         pom {
diff --git a/x/release-notes.md b/x/release-notes.md
index cbd77284f..d29fdd3d0 100644
--- a/x/release-notes.md
+++ b/x/release-notes.md
@@ -1,13 +1,18 @@
 # release notes for the jme3-utilities-x library and related tests
 
+## Version 0.2.6 released on TBD
+
+ + Bugfix: assertion failure in `Population.size()`.
+ + Based on version 2.12 of the jme3-utilities-heart library.
+
 ## Version 0.2.5 released on 23 September 2018
 
- + Renamed XVersion.getVersionShort() to versionShort(). (API change)
- + Based on version 2.10 of the heart library.
+ + Renamed `XVersion.getVersionShort()` to `versionShort()`. (API change)
+ + Based on version 2.10 of the jme3-utilities-heart library.
 
 ## Version 0.2.4 released on 24 July 2018
 
-Based on version 2.5 of the heart library.
+Based on version 2.5 of the jme3-utilities-heart library.
 
 ## Version 0.2.3 released on 25 January 2018
 
@@ -20,7 +25,7 @@ Based on version 2.5 of the heart library.
  + 1st release to target JME 3.2
  + Moved the LoopMesh class to the jme3-utilities-heart library.
  + Accommodated other changes in the jme3-utilities-heart library.
- + Renamed private field in NavDebug class.
+ + Renamed a private field in `NavDebug` class.
 
 ## Version 0.2.1 released on 20 May 2017
 
diff --git a/x/src/main/java/jme3utilities/x/XVersion.java b/x/src/main/java/jme3utilities/x/XVersion.java
index 59cf29dd2..362afb719 100644
--- a/x/src/main/java/jme3utilities/x/XVersion.java
+++ b/x/src/main/java/jme3utilities/x/XVersion.java
@@ -60,6 +60,6 @@ private XVersion() {
      * @return branch and revision (not null, not empty)
      */
     public static String versionShort() {
-        return "master 0.2.5+1";
+        return "master 0.2.6";
     }
 }