diff --git a/crates/sage/src/endpoints/keys.rs b/crates/sage/src/endpoints/keys.rs
index 3b59b515..5f6974f0 100644
--- a/crates/sage/src/endpoints/keys.rs
+++ b/crates/sage/src/endpoints/keys.rs
@@ -148,7 +148,30 @@ impl Sage {
                 return Err(Error::InvalidKey);
             }
         } else {
-            let mnemonic = Mnemonic::from_str(&req.key)?;
+            let words: Vec<&str> = req.key.split_whitespace().collect();
+            let word_count = words.len();
+
+            if word_count != 12 && word_count != 24 {
+                return Err(Error::InvalidMnemonic(format!(
+                    "Expected 12 or 24 words, but got {word_count}."
+                )));
+            }
+
+            let mnemonic = Mnemonic::from_str(&req.key).map_err(|e| match e {
+                bip39::Error::BadWordCount(count) => Error::InvalidMnemonic(format!(
+                    "Expected 12 or 24 words, but got {count}."
+                )),
+                bip39::Error::UnknownWord(idx) => Error::InvalidMnemonic(format!(
+                    "Word #{} ({}) is not a valid BIP39 word.",
+                    idx + 1,
+                    words.get(idx).copied().unwrap_or("unknown"),
+                )),
+                bip39::Error::InvalidChecksum => Error::InvalidMnemonic(
+                    "Invalid checksum. Please verify all words are correct and in the right order."
+                        .to_string(),
+                ),
+                _ => Error::InvalidMnemonic(format!("Invalid mnemonic: {e}")),
+            })?;
             let master_sk = SecretKey::from_seed(&mnemonic.to_seed(""));
             let master_pk = master_sk.public_key();
             let fingerprint = if req.save_secrets {
diff --git a/crates/sage/src/endpoints/offers.rs b/crates/sage/src/endpoints/offers.rs
index c80a21cc..b6d72019 100644
--- a/crates/sage/src/endpoints/offers.rs
+++ b/crates/sage/src/endpoints/offers.rs
@@ -81,6 +81,17 @@ impl Sage {
             }
         }
 
+        let has_offered_assets = offered.xch > 0
+            || !offered.cats.is_empty()
+            || !offered.nfts.is_empty()
+            || !offered.options.is_empty();
+
+        if !has_offered_assets && offered.fee == 0 {
+            return Err(Error::InvalidAmount(
+                "A request-only offer requires a network fee.".to_string(),
+            ));
+        }
+
         let mut requested = Requested::default();
         let mut peer = None;
 
diff --git a/crates/sage/src/error.rs b/crates/sage/src/error.rs
index 66ff45a0..043f7e0e 100644
--- a/crates/sage/src/error.rs
+++ b/crates/sage/src/error.rs
@@ -122,6 +122,9 @@ pub enum Error {
     #[error("Invalid key")]
     InvalidKey,
 
+    #[error("{0}")]
+    InvalidMnemonic(String),
+
     #[error("Wrong address prefix: {0}")]
     AddressPrefix(String),
 
@@ -279,6 +282,7 @@ impl Error {
             Self::Bls(..)
             | Self::Hex(..)
             | Self::InvalidKey
+            | Self::InvalidMnemonic(..)
             | Self::TryFromSlice(..)
             | Self::TryFromInt(..)
             | Self::ParseInt(..)
diff --git a/src/components/NftCard.tsx b/src/components/NftCard.tsx
index d8354f1c..30dfbc6d 100644
--- a/src/components/NftCard.tsx
+++ b/src/components/NftCard.tsx
@@ -317,12 +317,12 @@ export function NftCard({ nft, updateNfts, selectionState }: NftCardProps) {
               <TooltipContent>
                 <p>
                   {nftName}
-                  {nft.edition_total != null && nft.edition_total > 1 && (
+                  {nft.edition_total != null && (nft.edition_total === 0 || nft.edition_total > 1) && (
                     <span>
                       {' '}
                       (
                       <Trans>
-                        {nft.edition_number} of {nft.edition_total}
+                        {nft.edition_number} of {nft.edition_total === 0 ? '∞' : nft.edition_total}
                       </Trans>
                       )
                     </span>
diff --git a/src/components/ui/dialog.tsx b/src/components/ui/dialog.tsx
index c5fde55b..68beae52 100644
--- a/src/components/ui/dialog.tsx
+++ b/src/components/ui/dialog.tsx
@@ -64,7 +64,7 @@ const DialogContent = React.forwardRef<
       <DialogPrimitive.Content
         ref={ref}
         className={cn(
-          'fixed left-[50%] top-[50%] z-50 grid w-full md:max-w-lg max-w-sm translate-x-[-50%] translate-y-[-50%] gap-4 border bg-card p-6 text-card-foreground shadow-lg duration-200 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[state=closed]:slide-out-to-left-1/2 data-[state=closed]:slide-out-to-top-[48%] data-[state=open]:slide-in-from-left-1/2 data-[state=open]:slide-in-from-top-[48%] rounded-lg',
+          'fixed left-[50%] top-[50%] z-50 grid w-full md:max-w-lg max-w-sm translate-x-[-50%] translate-y-[-50%] gap-4 border bg-card p-6 text-card-foreground shadow-lg duration-200 max-h-[85vh] overflow-y-auto data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[state=closed]:slide-out-to-left-1/2 data-[state=closed]:slide-out-to-top-[48%] data-[state=open]:slide-in-from-left-1/2 data-[state=open]:slide-in-from-top-[48%] rounded-lg',
           className,
         )}
         style={mergedStyles}
diff --git a/src/pages/ImportWallet.tsx b/src/pages/ImportWallet.tsx
index 609736e7..55f0e6ad 100644
--- a/src/pages/ImportWallet.tsx
+++ b/src/pages/ImportWallet.tsx
@@ -183,9 +183,10 @@ export default function ImportWallet() {
                       </FormControl>
                       <FormDescription>
                         <Trans>
-                          Enter your mnemonic, private key, or public key above.
-                          If it&apos;s a public key, it will be imported as a
-                          read-only cold wallet.
+                          Enter your 12 or 24-word mnemonic seed phrase, private
+                          key, or public key. Words should be separated by
+                          spaces. If it&apos;s a public key, it will be imported
+                          as a read-only cold wallet.
                         </Trans>
                       </FormDescription>
                       <FormMessage />
diff --git a/src/pages/MakeOffer.tsx b/src/pages/MakeOffer.tsx
index c16c4d68..a8aa0ab6 100644
--- a/src/pages/MakeOffer.tsx
+++ b/src/pages/MakeOffer.tsx
@@ -86,6 +86,20 @@ export function MakeOffer() {
       });
       return;
     }
+
+    if (
+      !hasOfferedTokens &&
+      !hasOfferedNfts &&
+      !hasOfferedOptions &&
+      parseFloat(state.fee || '0') === 0
+    ) {
+      addError({
+        kind: 'invalid',
+        reason: t`A request-only offer requires a network fee.`,
+      });
+      return;
+    }
+
     setIsConfirmDialogOpen(true);
   };
 
diff --git a/src/pages/Nft.tsx b/src/pages/Nft.tsx
index ad6b9e46..88f42457 100644
--- a/src/pages/Nft.tsx
+++ b/src/pages/Nft.tsx
@@ -272,10 +272,10 @@ export default function Nft() {
                   address={nft?.launcher_id ?? ''}
                 />
 
-                {nft?.edition_total != null && nft?.edition_total > 1 && (
+                {nft?.edition_total != null && (nft?.edition_total === 0 || nft?.edition_total > 1) && (
                   <LabeledItem
                     label={t`Edition`}
-                    content={`${nft.edition_number} of ${nft.edition_total}`}
+                    content={`${nft.edition_number} of ${nft.edition_total === 0 ? '∞' : nft.edition_total}`}
                   />
                 )}