diff --git a/camb/__init__.py b/camb/__init__.py
index 6a344ab3..63678b18 100644
--- a/camb/__init__.py
+++ b/camb/__init__.py
@@ -7,7 +7,7 @@
 __author__ = "Antony Lewis"
 __contact__ = "antony at cosmologist dot info"
 __url__ = "https://camb.readthedocs.io"
-__version__ = "1.5.2"
+__version__ = "1.5.3"
 
 from . import baseconfig
 
diff --git a/camb/cambdll.dll b/camb/cambdll.dll
index 89511d92..e2cb2f90 100644
Binary files a/camb/cambdll.dll and b/camb/cambdll.dll differ
diff --git a/camb/dark_energy.py b/camb/dark_energy.py
index 1cf5642c..96f5f23a 100644
--- a/camb/dark_energy.py
+++ b/camb/dark_energy.py
@@ -94,6 +94,12 @@ def validate_params(self):
             if self.wa and (self.w < -1 - 1e-6 or 1 + self.w + self.wa < - 1e-6):
                 raise CAMBError('fluid dark energy model does not support w crossing -1')
 
+    def set_w_a_table(self, a, w):
+        # check w array has elements that are all the same sign or zero
+        if np.sign(1 + np.max(w)) - np.sign(1 + np.min(w)) == 2:
+            raise ValueError('fluid dark energy model does not support w crossing -1')
+        super().set_w_a_table(a, w)
+
 
 @fortran_class
 class DarkEnergyPPF(DarkEnergyEqnOfState):
diff --git a/docs/CAMBdemo.ipynb b/docs/CAMBdemo.ipynb
index d23ce98c..be3967ae 100644
--- a/docs/CAMBdemo.ipynb
+++ b/docs/CAMBdemo.ipynb
@@ -18,7 +18,7 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Using CAMB 1.5.1 installed at c:\\work\\dist\\git\\camb\\camb\n"
+      "Using CAMB 1.5.2 installed at c:\\work\\dist\\git\\camb\\camb\n"
      ]
     }
    ],
@@ -1292,7 +1292,7 @@
     "for z in zplot:\n",
     "    plt.loglog(k, PK.P(z,k))\n",
     "plt.xlim([1e-4,kmax])\n",
-    "plt.xlabel('k Mpc')\n",
+    "plt.xlabel(r'k Mpc')\n",
     "plt.ylabel('$P_\\Psi\\, Mpc^{-3}$')\n",
     "plt.legend(['z=%s'%z for z in zplot]);\n"
    ]
@@ -2857,7 +2857,7 @@
      "name": "stderr",
      "output_type": "stream",
      "text": [
-      "C:\\Users\\Antony\\AppData\\Local\\Temp\\ipykernel_29556\\455262666.py:12: UserWarning: Data has no positive values, and therefore cannot be log-scaled.\n",
+      "C:\\Users\\Antony\\AppData\\Local\\Temp\\ipykernel_30204\\455262666.py:12: UserWarning: Data has no positive values, and therefore cannot be log-scaled.\n",
       "  ax.set_xlim(k[0], k[-1])\n"
      ]
     },
diff --git a/fortran/DarkEnergyFluid.f90 b/fortran/DarkEnergyFluid.f90
index d6d50581..cffa6412 100644
--- a/fortran/DarkEnergyFluid.f90
+++ b/fortran/DarkEnergyFluid.f90
@@ -83,7 +83,7 @@ subroutine TDarkEnergyFluid_Init(this, State)
         this%num_perturb_equations = 0
     else
         if (this%use_tabulated_w) then
-            if (any(this%equation_of_state%F<-1)) &
+            if (any(this%equation_of_state%F<-1) .and. any(this%equation_of_state%F>-1)) &
                 error stop 'Fluid dark energy model does not allow w crossing -1'
         elseif (this%wa/=0 .and. &
             ((1+this%w_lam < -1.e-6_dl) .or. 1+this%w_lam + this%wa < -1.e-6_dl)) then
diff --git a/fortran/config.f90 b/fortran/config.f90
index 742b6a4b..a99c25bf 100644
--- a/fortran/config.f90
+++ b/fortran/config.f90
@@ -3,7 +3,7 @@ module config
     use constants, only: const_twopi
     implicit none
 
-    character(LEN=*), parameter :: version = '1.5.2'
+    character(LEN=*), parameter :: version = '1.5.3'
 
     integer :: FeedbackLevel = 0 !if >0 print out useful information about the model