diff --git a/.gitignore b/.gitignore
index a71c8f3..3bca399 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 *.[oa]
 build/*
+build-*tar.gz
 *~
 release/
 release*
diff --git a/README.md b/README.md
index 8d453f8..3a6275c 100755
--- a/README.md
+++ b/README.md
@@ -1,15 +1,11 @@
 # How to get cloneHD and filterHD?
 
-The current stable release, including pre-compiled executable binaries
-of filterHD and cloneHD for Mac OS X (64bit), can be found at:
-
-`ftp://ftp.sanger.ac.uk/pub/teams/153/cloneHD/`  
-
-The source code can also be downloaded here.
+The current stable release, as well as pre-compiled executable binaries 
+for Mac OS X and GNU Linux (64bit), can be found [here](https://github.com/andrej-fischer/cloneHD/releases). The cloneHD software is undergoing rapid development. Watch/Star this repo to receive updates.
 
 # Run a test with simulated data
 
-If you download cloneHD from the ftp site above, you can test both filterHD and cloneHD by running
+After downloading cloneHD from the release site, you can test both filterHD and cloneHD by running
 
 `$ sh run-example.sh`
 
@@ -18,12 +14,15 @@ data with a matched normal. All command line arguments are explained below.
 
 # Compilation  
 
-For Mac OS X (64bit), there are pre-compiled binaries available on the ftp server above. To compile cloneHD yourself, you need the GNU scientific library ([GSL](http://www.gnu.org/software/gsl/)) v1.15 or later. Change the paths in the Makefile to your GSL installation location (if non-standard). Then type 
+For Mac OS X and GNU Linux (64bit), pre-compiled binaries are available [here](https://github.com/andrej-fischer/cloneHD/releases). To compile cloneHD yourself, you need the GNU scientific library ([GSL](http://www.gnu.org/software/gsl/)) v1.15 or later. Change the paths in the Makefile to point to your local GSL installation (if non-standard). Then type 
 
 `$ make`
 
-in the source directory. The two executables, `filterHD` and
-`cloneHD`, will be in `./build`. For debugging with gdb, use `make -f Makefile.debug`.
+in the `src` directory. The executables will be in `build`. For debugging with gdb, use `make -f Makefile.debug`.
+
+# Report bugs
+
+To report bugs, use the [issue](https://github.com/andrej-fischer/cloneHD/issues) interface of github.
 
 # What are cloneHD and filterHD for?
 
@@ -81,20 +80,17 @@ The full documentation can be found in the `/docs/` subfolder. Click below.
    bias field for the tumor CNA data. Follow the logic of the example
    given here.
 
-*  If the matched-normal was sequenced at lower coverage than the tumor, it might be necessary 
-   to run filterHD with a higher-than-optimal diffusion constant (set with `--sigma [double]`)
-   to obtain a more faithful bias field. Otherwise, the filterHD solution is too stiff and 
-   you loose bias detail.
+*  If the matched-normal sample was sequenced at lower coverage than the tumor sample, it might be necessary to run filterHD with a higher-than-optimal diffusion constant (set with `--sigma [double]`) to obtain a more faithful bias field. Otherwise, the filterHD solution is too stiff and you loose bias detail.
 
-*  filterHD can sometimes run into local optima. It might be useful to
-   fix initial values for the parameters via `--jumpi [double]` etc.
+*  filterHD can sometimes run into local optima. In this case, it might be useful to
+   set initial values for the parameters via `--jumpi [double]` etc.
 
 *  By default, cloneHD runs with mass gauging enabled. This seems like
    an overkill, but is actually quite useful because you can see some
    alternative explanations during the course of the analysis.
 
 *  Don't put too much weight on the BIC criterion. It was calibrated
-   using simulated data. For real data, it should be supplied together with
+   using simulated data. For real data, it should be supplemented with
    common sense and biological knowledge. Use `--force [int]` to use a
    fixed number of subclones and `--max-tcn [int]` to set the maximum possible total
    copy number.
diff --git a/changelog.md b/changelog.md
index adeb54d..008fcc4 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,10 @@
 # changelog for cloneHD/filterHD
 
+## v1.17.5 / 22.04.2014
+
+*  fixed memory alloc bug in pre-filter
+*  abandon ftp site for releases, used only for backup and beta
+
 ## v1.17.4 / 10.04.2014
 
 *  fixed fatal bug in snv-mode with correlations
diff --git a/src/cloneHD.cpp b/src/cloneHD.cpp
index 0880461..a46bf0e 100755
--- a/src/cloneHD.cpp
+++ b/src/cloneHD.cpp
@@ -165,7 +165,13 @@ int main (int argc, const char * argv[]){
   else{
     // ****** INFERENCE STARTS HERE ******
     bestn = infer_clones( clones, mass, &myClone, opts);
-    printf("cloneHD found support for %i sub-clone(s) in the data.\n", bestn);
+    printf("cloneHD in ");
+    if (cnaEmit.is_set && bafEmit.is_set && snvEmit.is_set) cout<<"cna-baf-snv ";
+    if (cnaEmit.is_set && bafEmit.is_set && !snvEmit.is_set) cout<<"cna-baf ";
+    if (cnaEmit.is_set && !bafEmit.is_set && snvEmit.is_set) cout<<"cna-snv ";
+    if (cnaEmit.is_set && !bafEmit.is_set && !snvEmit.is_set) cout<<"cna ";
+    if (!cnaEmit.is_set && !bafEmit.is_set && snvEmit.is_set) cout<<"snv ";
+    printf("mode found support for %i sub-clone(s) in the data.\n", bestn);
     // ****** INFERENCE COMPLETED ********
   }
   print_all_results( &myClone, opts);
diff --git a/src/pre-filter.cpp b/src/pre-filter.cpp
index 9c34aa7..d8b57d4 100755
--- a/src/pre-filter.cpp
+++ b/src/pre-filter.cpp
@@ -199,6 +199,7 @@ void pre_filter( Emission& dataEmit, cmdl_opts& opts){
   for (int s=0; s < dataEmit.nSamples; s++){
     unsigned int * rds = dataEmit.reads[0][s];
     unsigned int * dps = dataEmit.depths[0][s];
+    if (dataEmit.nSites[s] == 0) abort();
     double * wMean = new double [dataEmit.nSites[s]];
     double * wVar  = new double [dataEmit.nSites[s]];
     int * mask     = new int    [dataEmit.nSites[s]];
@@ -238,21 +239,21 @@ void pre_filter( Emission& dataEmit, cmdl_opts& opts){
 	else if ( size < 2*opts.wSize+1 ){
 	  size++;
 	}
-	while (front < dataEmit.nSites[s]){
+	while (front < dataEmit.nSites[s]-1){
 	  front++;
 	  if (dps[front] > 0) break;
 	}
 	if (front < dataEmit.nSites[s]){
 	  sum += fabs(median - double(rds[front]) / double(dps[front]));
 	}
-	while (center < dataEmit.nSites[s]){
+	while (center < dataEmit.nSites[s]-1){
 	  center++;
 	  if (center < 0 || dps[center] > 0 ) break;
 	}
 	if (back >= 0){
 	  sum -= fabs(median - double(rds[back]) / double(dps[back]));
 	}
-	while (back < dataEmit.nSites[s]){
+	while (back < dataEmit.nSites[s]-1){
 	  back++;
 	  if ( back < 0 || dps[back] > 0 ) break;
 	}
@@ -275,21 +276,21 @@ void pre_filter( Emission& dataEmit, cmdl_opts& opts){
 	else if ( size < 2*opts.wSize+1 ){
 	  size++;
 	}
-	while (front < dataEmit.nSites[s]){
+	while (front < dataEmit.nSites[s]-1){
 	  front++;
 	  if (dps[front] > 0 && mask[front]==1) break;
 	}
 	if (front < dataEmit.nSites[s]){
 	  sum += double(rds[front]) / double(dps[front]);
 	}
-	while (center < dataEmit.nSites[s]){
+	while (center < dataEmit.nSites[s]-1){
 	  center++;
 	  if (center < 0 || (dps[center] > 0 && mask[center]==1)) break;
 	}
 	if (back >= 0){
 	  sum -= double(rds[back]) / double(dps[back]);
 	}
-	while (back < dataEmit.nSites[s]){
+	while (back < dataEmit.nSites[s]-1){
 	  back++;
 	  if ( back<0 || (dps[back]>0 && mask[back]==1 ) ) break;
 	}