diff --git a/CONTROL/control b/CONTROL/control
index bc599cc..78bdc3f 100644
--- a/CONTROL/control
+++ b/CONTROL/control
@@ -1,7 +1,7 @@
 Package: sweeper
 Priority: optional
 Section: misc
-Version: 2.1.1
+Version: 2.1.2
 Architecture: mipsel
 Maintainer: af123@hummypkg.org.uk
 Depends: webif(>=1.3.0-1)
diff --git a/webif/plugin/sweeper/auto.hook b/webif/plugin/sweeper/auto.hook
index c5b52d7..af87db5 100644
--- a/webif/plugin/sweeper/auto.hook
+++ b/webif/plugin/sweeper/auto.hook
@@ -33,6 +33,9 @@ proc ::sweeper::intcomp {ref val} {
 
 # Substring/pattern check
 proc ::sweeper::strcontains {ref val} {
+	if {[string index $val 0] eq "~"} {
+		return [regexp -nocase -- [string range $val 1 end] $ref]
+	}
 	if {[string first "*" $val] > -1} {
 		return [string match -nocase $val $ref]
 	}
@@ -42,18 +45,19 @@ proc ::sweeper::strcontains {ref val} {
 }
 
 set ::sweeper::expand_fns {
-	replace {2}
-	regsub {2}
+	replace {3 {inline fallback}}
+	regsub {3 {inline fallback}}
 	asfilename {1 {inline}}
+	asuniqfilename {1 {inline}}
 	format {2 {inline}}
 	var {1 {inline}}
 }
 
-proc ::sweeper::expand_replace {ts &ret search replace} {
+proc ::sweeper::expand_fb_replace {ts &ret search replace} {
 	set ret [string map [list $search $replace] $ret]
 }
 
-proc ::sweeper::expand_regsub {ts &ret search replace} {
+proc ::sweeper::expand_fb_regsub {ts &ret search replace} {
 	if {[catch {
 		regsub -all -- $search $ret $replace ret
 	} msg]} {
@@ -61,10 +65,40 @@ proc ::sweeper::expand_regsub {ts &ret search replace} {
 	}
 }
 
+proc ::sweeper::expand_replace {ts &ret arg search replace} {
+	set arg [string map [list $search $replace] $arg]
+	return $arg
+}
+
+proc ::sweeper::expand_regsub {ts &ret arg search replace} {
+	if {[catch {
+		regsub -all -- $search $arg $replace arg
+	} msg]} {
+		log "Error. %regsub - $msg"
+	}
+	return $arg
+}
+
 proc ::sweeper::expand_asfilename {ts &ret arg} {
 	return [system filename $arg]
 }
 
+proc ::sweeper::expand_asuniqfilename {ts &ret arg} {
+	set arg [system filename $arg]
+	if {[string index $arg 0] ne "/"} {
+		set path "[$ts dir]/$arg"
+	} else {
+		set path $arg
+	}
+	if {[file isfile "$path.ts"]} {
+		set i 2
+		while {[file isfile "${path}_$i.ts"]} { incr i }
+		append arg "_$i"
+	}
+
+	return $arg
+}
+
 proc ::sweeper::expand_format {ts &ret format arg} {
 	if {[catch {set r [format $format $arg]} msg]} {
 		log "Error. %format - $msg"
@@ -109,11 +143,24 @@ proc ::sweeper::expand {ts str {orig ""}} {
 			# Extract the arguments
 			set pos $chpos
 			set fnargs {}
+			set e -1
 			while {[llength $fnargs] < $numargs} {
 				incr pos
+				set le $e
 				set e [string first $ch $ret $pos]
 				if {$e == -1} {
-					log "Error. %$fn - [llength $fnargs]/$numargs parameters found."
+					# Insufficient arguments.
+					set argcnt [llength $fnargs]
+					if {"fallback" in $flags &&
+					    "inline" in $flags &&
+					    [expr $argcnt + 1] == $numargs} {
+						log "%$fn - falling back." 2
+						set fn "fb_$fn"
+						set flags {}
+						set e $le
+					} else {
+						log "Error. %$fn - $argcnt/$numargs parameters found."
+					}
 					break
 				}
 				lappend fnargs [::sweeper::expand $ts [
@@ -132,7 +179,9 @@ proc ::sweeper::expand {ts str {orig ""}} {
 				# the result.
 				set fnret [
 				    ::sweeper::expand_$fn $ts ret {*}$fnargs]
+				set oret $ret
 				set ret [string replace $ret $s $e $fnret]
+				log "     $fn\($oret) -> \[$ret]" 2
 			} else {
 				# otherwise, queue the function up for later
 				# execution.
diff --git a/webif/plugin/sweeper/edit.jim b/webif/plugin/sweeper/edit.jim
index 977e48f..3fcb7b0 100755
--- a/webif/plugin/sweeper/edit.jim
+++ b/webif/plugin/sweeper/edit.jim
@@ -169,8 +169,8 @@ For pattern matching, the following special sequences may appear in the pattern:
 	<div class="hidden edit_textmatch_help blood"
 	    id=edit_textmatch_help_textmatch>
 <br>
-You can enter either a substring which must be found somewhere or a pattern<br>
-which must be matched.
+You can enter either a substring which must be found somewhere, a pattern<br>
+which must be matched or a regular expression prefixed with ~.
 <br>
 For pattern matching, the following special sequences may appear in the pattern:
 <div style="width: 600px;margin: 1em">