diff --git a/memes.lua b/memes.lua
index 05540eb..27b8467 100644
--- a/memes.lua
+++ b/memes.lua
@@ -169,6 +169,8 @@ local COLOR_BLACK = imlib.color.new(  0,   0,   0)
 
 local function draw_centered_lines (draw_onto, lines, x0, y0, width, font, font_colors)
     assert(type(lines) == 'table')
+    assert(type(font_colors) == 'table' and #font_colors >= 1)
+    --
     local y = y0
     for i, line in ipairs(lines) do
         local text_w, text_h  =  font:get_size(line)
@@ -213,16 +215,20 @@ local function determine_font_and_lines_for_box (font_name, text, width, height)
     local actual_font  =  load_font_of_size(font_name, min_font_size)
 
     -- Assertions and error correction
+    --[[
     if (#actual_lines * select(2, actual_font:get_size(text)) < height) then
         io.write(' !! Performed bad fitting of text: '..text..'\n')
         actual_font, actual_lines  =  determine_required_font_size(font_name, text, width), {text}
     end
+    --]]
 
     return actual_font, actual_lines
 end
 
 local function draw_centered_text_in_box (font_name, draw_onto, text, x0, y0, width, height, bg_color, font_colors)
-    assert(type(font_name) == 'string')
+    assert(type(font_name)   == 'string')
+    assert(type(font_colors) == 'table' and #font_colors >= 1)
+    --
     local font, lines  =  determine_font_and_lines_for_box(font_name, text, width, height)
     --
     local y  =  y0 + (height - #lines * select(2, font:get_size(text))) / 2
@@ -248,6 +254,10 @@ local function paste_topic_onto_image (target, topic, x, y, w, h, bg_color, font
     assert(target)
     assert(type(topic) == 'table')
     assert(type(font_name) == 'string')
+
+    if not font_color then  font_color = { COLOR_BLACK }  end
+    assert(type(font_color) == 'table' and #font_color >= 1)
+
     -- Download and paste found image
     if topic.type == 'image' then
 	    assert(type(topic.filename) == 'string')
@@ -417,6 +427,8 @@ local function generate_comparison_meme_generator (positions)
         -- Paste topic onto head
         for index, pos in ipairs(rand_positions) do
             -- Font colors
+            if pos.font_color == nil then  pos.font_color  =  COLOR_BLACK  end
+
             local font_colors  =  {}
             if     pos.font_color == COLOR_WHITE then  font_colors[1]  =  COLOR_BLACK
             elseif pos.font_color == COLOR_BLACK then  font_colors[1]  =  COLOR_WHITE
@@ -425,6 +437,7 @@ local function generate_comparison_meme_generator (positions)
 
             -- Paste
             assert(base_img, topics[index])
+            assert(type(font_colors) == 'table' and #font_colors >= 1)
             paste_topic_onto_image(base_img, topics[index], pos.x, pos.y, pos.w, pos.h, nil, font_name, font_colors)
         end