diff --git a/NEWS-1.3.md b/NEWS-1.3.md
index 5a0aae54e0c..42cfb23855b 100644
--- a/NEWS-1.3.md
+++ b/NEWS-1.3.md
@@ -128,6 +128,7 @@
 * Enable wrap-around for previous/next source tab by default (#6139)
 * Provide full SHA in detail of Git commits (#6155)
 * File monitor now ignores Packrat, renv library folders (#3267)
+* Make global source control commands rebindable (#6503)
 
 ### Bugfixes
 
diff --git a/src/cpp/session/SessionDirs.cpp b/src/cpp/session/SessionDirs.cpp
index 89f1fa2d313..c1080c4ad26 100644
--- a/src/cpp/session/SessionDirs.cpp
+++ b/src/cpp/session/SessionDirs.cpp
@@ -29,14 +29,21 @@ namespace dirs {
 
 FilePath getDefaultWorkingDirectory()
 {
-   // calculate using user settings
-   FilePath defaultWorkingDir = module_context::resolveAliasedPath(
-         prefs::userPrefs().initialWorkingDirectory());
+   // see if the user has defined a default working directory in preferences
+   FilePath defaultWorkingDir;
+   std::string initialWorkingDir = prefs::userPrefs().initialWorkingDirectory();
+   if (!initialWorkingDir.empty())
+   {
+      // the user has defined a default; resolve the path
+      defaultWorkingDir = module_context::resolveAliasedPath(initialWorkingDir);
+   }
+
+   // see if there's a working directory defined in the R session options (set by
+   // session-default-working-dir)
    FilePath sessionDefaultWorkingDir = FilePath(session::options().defaultWorkingDir());
 
-   // return it if it exists, otherwise use the
-   // session specified value if it exists
-   // otherwise, use the default user home path
+   // return the first of these directories that is defined and exists, or the user home directory
+   // in the case that neither exists
    if (defaultWorkingDir.exists() && defaultWorkingDir.isDirectory())
       return defaultWorkingDir;
    else if (sessionDefaultWorkingDir.exists() && sessionDefaultWorkingDir.isDirectory())
diff --git a/src/cpp/session/modules/SessionFind.cpp b/src/cpp/session/modules/SessionFind.cpp
index e7df7171c9a..0e294b51dad 100644
--- a/src/cpp/session/modules/SessionFind.cpp
+++ b/src/cpp/session/modules/SessionFind.cpp
@@ -999,17 +999,27 @@ class GrepOperation : public boost::enable_shared_from_this<GrepOperation>
             matchOffs.push_back(matchOff);
             replaceMatchOns.push_back(replaceMatchOn);
             replaceMatchOffs.push_back(replaceMatchOff);
-            for (std::string newError : errorMessage)
-               errors.push_back(newError);
+            json::Array combinedErrors = json::toJsonArray(errorMessage);
+            errors.push_back(combinedErrors);
             recordsToProcess--;
          }
       }
+      // when doing a replace, we haven't completed the replace for the last file here
       if (findResults().replace() && !currentFile_.empty() && !findResults().preview())
       {
          std::set<std::string> errorMessage;
          completeFileReplace(&errorMessage);
-         for (std::string newError : errorMessage)
-            errors.push_back(json::Value(newError));
+
+         // it is unlikely there will be any errors if we've made it this far,
+         // but if so we must add them to the last array in errors
+         // if there is an error, there will only be one
+         if (!errorMessage.empty())
+         {
+            json::Array lastErrors = errors.getBack().getArray();
+            errors.erase(errors.end());
+            lastErrors.push_back(json::Value(*errorMessage.begin()));
+            errors.push_back(lastErrors);
+         }
       }
 
       if (nextLineStart)
diff --git a/src/cpp/session/modules/SessionRenv.R b/src/cpp/session/modules/SessionRenv.R
index b07b978f402..bf896836c50 100644
--- a/src/cpp/session/modules/SessionRenv.R
+++ b/src/cpp/session/modules/SessionRenv.R
@@ -17,9 +17,25 @@
 
 .rs.addJsonRpcHandler("renv_init", function(project)
 {
-   # ask renv not to restart since we'll do it ourselves
-   .rs.ensureDirectory(project)
-   renv::init(project = project, restart = FALSE)
+   # the project directory should already exist, but be extra careful
+   # and create it if necessary
+   dir.create(project, showWarnings = FALSE, recursive = TRUE)
+   owd <- setwd(project)
+   on.exit(setwd(owd), add = TRUE)
+   
+   # set library paths to be inherited by child process
+   libs <- paste(.libPaths(), collapse = .Platform$path.sep)
+   renv:::renv_scope_envvars(R_LIBS = libs)
+   
+   # form path to R
+   exe <- if (Sys.info()[["sysname"]] == "Windows") "R.exe" else "R"
+   r <- file.path(R.home("bin"), exe)
+   
+   # form command line arguments
+   args <- c("--vanilla", "--slave", "-e", shQuote("renv::init()"))
+   
+   # invoke R
+   system2(r, args)
 })
 
 .rs.addJsonRpcHandler("renv_actions", function(action)
diff --git a/src/cpp/session/modules/SessionSource.R b/src/cpp/session/modules/SessionSource.R
index 71da6934cc7..213f1eeb18c 100644
--- a/src/cpp/session/modules/SessionSource.R
+++ b/src/cpp/session/modules/SessionSource.R
@@ -184,8 +184,10 @@
    
    if (length(args) > 0)
    {
-      for (ee in args)
-         freeVars <- c(freeVars, codetools:::walkCode(ee, w))
+      # Needs to access the list via index in case of empty strings
+      # see https://github.com/rstudio/rstudio/issues/5285
+      for (i in seq_along(args))
+         freeVars <- c(freeVars, codetools:::walkCode(args[[i]], w))
    }
    return(unique(freeVars))
 })