diff --git a/CHANGES/v2.1.txt b/CHANGES/v2.1.txt
index 5ee2efb83667684f469b66b07fa3b4d308e60dc3..320e3745f6745632e1bbdef8b0c67d6357445898 100644
--- a/CHANGES/v2.1.txt
+++ b/CHANGES/v2.1.txt
@@ -30,7 +30,7 @@ character now has a special usage in component names.
   if these libraries are not installed.
 - New actions:
   - \ref SPRINT topological collective variables.
-  - \ref CH3SHIFTS collective variable.
+  - CH3SHIFTS collective variable.
   - \ref POSITION collective variable.
   - \ref FIT_TO_TEMPLATE.
   - \ref COMMITTOR analysis.
diff --git a/src/analysis/PCA.cpp b/src/analysis/PCA.cpp
index d2d690fcdb719b044c42ec484c143df336eb3c83..000e1cfa81cfb831767398b3100c9c62e87ca5fd 100644
--- a/src/analysis/PCA.cpp
+++ b/src/analysis/PCA.cpp
@@ -73,7 +73,7 @@ elements of the covariance matrix from the input vectors.  In this calculation t
 Trajectory frames will be collected every five steps and the PCA calculation is performed every 1000 steps.  Consequently, if you run a 2000 step simulation the 
 PCA analysis will be performed twice.  The REWEIGHT_BIAS keyword in this input tells PLUMED that rather that ascribing a weight of one to each of the frames
 when calculating averages and covariances a reweighting should be performed based and each frames' weight in these calculations should be determined based on 
-the current value of the instantaneous bias (see \ref reweighting).  
+the current value of the instantaneous bias (see \ref REWEIGHT_BIAS).  
 
 \verbatim
 d1: DISTANCE ATOMS=1,2
diff --git a/src/cltools/Driver.cpp b/src/cltools/Driver.cpp
index b48fbfc69a2a0ed2ff61581fd4a3113dcd9960f3..922936021d587a348a6800c4db33e4ede40f48cd 100644
--- a/src/cltools/Driver.cpp
+++ b/src/cltools/Driver.cpp
@@ -77,6 +77,8 @@ plumed driver-float --plumed plumed.dat --ixyz trajectory.xyz
 See also examples in \ref driver
 
 */
+//+ENDPLUMEDOC
+//
 
 
 //+PLUMEDOC TOOLS driver
diff --git a/src/multicolvar/FilterBetween.cpp b/src/multicolvar/FilterBetween.cpp
index 29a163a5e68c918bda085a15e4d96f95d753730b..07f52c475315a3d1afada398e11b0c17958fda63 100644
--- a/src/multicolvar/FilterBetween.cpp
+++ b/src/multicolvar/FilterBetween.cpp
@@ -45,7 +45,7 @@ MEAN for \ref MFILTER_BETWEEN one is thus calculating:
 \mu = \frac{ \sum_i f_i s_i }{ \sum_i f_i}
 \f]
 
-In this action by contrast the colvar is being transformed by the \ref histogram bead.  If one thus calculates a MEAN for 
+In this action by contrast the colvar is being transformed by the \ref histogrambead.  If one thus calculates a MEAN for 
 thia action one computes:
 
 \f[
diff --git a/user-doc/Bias.txt b/user-doc/Bias.txt
index 0f1b8cb334fff3fc44d55e5bcc3a9142fb498f62..94eb105e34cff6289a146238f81d1219e8a60644 100644
--- a/user-doc/Bias.txt
+++ b/user-doc/Bias.txt
@@ -10,8 +10,5 @@ The list of enhanced sampling algorithms contained in PLUMED is as follows:
 Methods, such as \ref METAD or \ref PBMETAD, that work by introducing a history dependent bias can be restarted 
 using the \subpage RESTART keyword
 
-You can also use PLUMED in conjunction with VMD's interactive MD module by taking
-advantage of the \subpage IMD action.
-
 */