diff --git a/Cargo.toml b/Cargo.toml
index 37197fa..b88ecd1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,7 +10,8 @@ edition = "2018"
 async = ["tokio"]
 
 [profile.release]
-opt-level = 3
+opt-level = 1 # opt-level >1 causes strange bug in regards to size of memory map??? it still happens on one just not as much????
+# To test map a large file in /tmp a bunch of times and hash it.
 lto = "fat"
 codegen-units = 1
 
@@ -21,4 +22,4 @@ tokio = {version = "0.2", features= ["full"], optional=true}
 reqwest = {version = "0.10", features= ["stream"]}
 memmap = "0.7"
 getrandom = "0.1"
-base64 = "0.12"
\ No newline at end of file
+base64 = "0.12"
diff --git a/TODO b/TODO
index ea83225..3c90a32 100644
--- a/TODO
+++ b/TODO
@@ -4,3 +4,6 @@ Remove Cargo.lock when termprogress is uploaded and Cargo.toml is properly forma
 New UI:
 
 lolistealer --number 5 output-dir/
+
+
+!!! memmap slice size is incorrect on release build
diff --git a/src/loli/encoding.rs b/src/loli/encoding.rs
index 4708b48..65a82df 100644
--- a/src/loli/encoding.rs
+++ b/src/loli/encoding.rs
@@ -91,7 +91,7 @@ fn find_back(haystack: &[u8], needle: &[u8]) -> Option<usize> {
 }
 
 const MARKER_BASE64_BEGIN: &[u8] = b"base64,";
-const MARKER_BASE64_END: &[u8] = b"' />"; //Search from end here with .rev()
+const MARKER_BASE64_END: &[u8] = b"' /><p"; //Search from end here with .rev()
 
 /// Find the base64 page bounds in this array
 pub(super) fn find_bounds(from: impl AsRef<[u8]>) -> Result<Range<usize>, error::DecodeError>
@@ -102,11 +102,15 @@ pub(super) fn find_bounds(from: impl AsRef<[u8]>) -> Result<Range<usize>, error:
 	let start = start + MARKER_BASE64_BEGIN.len();
 	if let Some(end) = find_back(&from[start..], MARKER_BASE64_END) {//find_back(from, MARKER_BASE64_END) {
 	    let end = end - MARKER_BASE64_END.len();
-	    return Ok(Range {
+	    Ok(Range {
 		start,
 		end: end + start,
-	    });
+	    })
+	} else {
+	    //println!("WAAAAAAH: {:?}", std::str::from_utf8(&from[start..]));
+	    Err(error::DecodeError::Bounds(error::Bound::End))
 	}
+    } else {
+	Err(error::DecodeError::Bounds(error::Bound::Start))
     }
-    Err(error::DecodeError::Bounds)
 }
diff --git a/src/loli/error.rs b/src/loli/error.rs
index 25a2482..6b55181 100644
--- a/src/loli/error.rs
+++ b/src/loli/error.rs
@@ -5,6 +5,14 @@ use std::{
     path::PathBuf,
 };
 
+/// Start or end bounds
+#[derive(Debug)]
+pub enum Bound
+{
+    Start,
+    End,
+}
+
 #[derive(Debug)]
 pub enum DecodeError
 {
@@ -15,7 +23,7 @@ pub enum DecodeError
     /// Map contained invalid base64
     Base64,
     /// Couldn't find base64 bounds
-    Bounds,
+    Bounds(Bound),
     /// Bad size
     Size,
 }
@@ -38,7 +46,8 @@ impl fmt::Display for DecodeError
 	    Self::Map(io, path) => write!(f, "mmap (file {:?}) failed: {}", path, io),
 	    Self::Corrupt => write!(f, "data was corrupt (invalid utf-8)"),
 	    Self::Base64 => write!(f, "data was corrupt (invalid base64)"),
-	    Self::Bounds => write!(f, "couldn't find base64 bounds"),
+	    Self::Bounds(Bound::Start) => write!(f, "couldn't find base64 bounds (start)"),
+	    Self::Bounds(Bound::End) => write!(f, "couldn't find base64 bounds (end)"),
 	    Self::Size => write!(f, "bad size"),
 	}
     }