2106,2107c2106,2109
< 					if ($cover =~ m/\%(.*?)/isg) {
< 						$cover = infoFormat($file, $1, "TITLE").".jpg";
---
> 					if ($cover =~ /^%(.*?)(\..*?){0,1}$/) {
> 						my $suffix = $2 ? $2 : ".jpg";
> 						$cover = infoFormat($file, $1)."$suffix";
> 						$::d_info && Slim::Utils::Misc::msg("Variable Thumbnail: $cover from $1\n");
2109c2111
< 					push @filestotry, $cover; 
---
> 					if (defined $cover) {push @filestotry, $cover;}
2115,2116c2117,2120
< 					if ($cover =~ m/\%(.*?)/isg) {
< 						$cover = infoFormat($file, $1, "TITLE").".jpg";
---
> 					if ($cover =~ /^%(.*?)(\..*?){0,1}$/) {
> 						my $suffix = $2 ? $2 : ".jpg";
> 						$cover = infoFormat($file, $1)."$suffix";
> 						$::d_info && Slim::Utils::Misc::msg("Variable Cover: $cover from $1\n");
2118c2122
< 					push @filestotry, $cover; 
---
> 					if (defined $cover) {push @filestotry, $cover;}