diff --git a/pyfpdb/Database.py b/pyfpdb/Database.py
index 500dfb0a..2aea6790 100644
--- a/pyfpdb/Database.py
+++ b/pyfpdb/Database.py
@@ -951,6 +951,7 @@ class Database:
                         # hmmm, tested by commenting out rollback in grapher. lock seems to work but 
                         # then drop still hangs :-(  does work in some tests though??
                         # will leave code here for now pending further tests/enhancement ...
+                        c.execute("BEGIN TRANSACTION")
                         c.execute( "lock table %s in exclusive mode nowait" % (fk['fktab'],) )
                         #print "after lock, status:", c.statusmessage
                         #print "alter table %s drop constraint %s_%s_fkey" % (fk['fktab'], fk['fktab'], fk['fkcol'])
@@ -961,6 +962,7 @@ class Database:
                             if "does not exist" not in str(sys.exc_value):
                                 print "warning: drop pg fk %s_%s_fkey failed: %s, continuing ..." \
                                       % (fk['fktab'], fk['fkcol'], str(sys.exc_value).rstrip('\n') )
+                        c.execute("END TRANSACTION")
                     except:
                         print "warning: constraint %s_%s_fkey not dropped: %s, continuing ..." \
                               % (fk['fktab'],fk['fkcol'], str(sys.exc_value).rstrip('\n'))
@@ -984,6 +986,7 @@ class Database:
                     print "dropping pg index ", idx['tab'], idx['col']
                     try:
                         # try to lock table to see if index drop will work:
+                        c.execute("BEGIN TRANSACTION")
                         c.execute( "lock table %s in exclusive mode nowait" % (idx['tab'],) )
                         #print "after lock, status:", c.statusmessage
                         try:
@@ -995,6 +998,7 @@ class Database:
                             if "does not exist" not in str(sys.exc_value):
                                 print "warning: drop index %s_%s_idx failed: %s, continuing ..." \
                                       % (idx['tab'],idx['col'], str(sys.exc_value).rstrip('\n')) 
+                        c.execute("END TRANSACTION")
                     except:
                         print "warning: index %s_%s_idx not dropped %s, continuing ..." \
                               % (idx['tab'],idx['col'], str(sys.exc_value).rstrip('\n'))
diff --git a/pyfpdb/SQL.py b/pyfpdb/SQL.py
index fcebc5c9..06c6d648 100644
--- a/pyfpdb/SQL.py
+++ b/pyfpdb/SQL.py
@@ -146,8 +146,8 @@ class Sql:
                         id BIGSERIAL, PRIMARY KEY (id),
                         tourneysPlayerId INT NOT NULL, FOREIGN KEY (tourneysPlayerId) REFERENCES TourneysPlayers(id),
                         playerId INT NOT NULL, FOREIGN KEY (playerId) REFERENCES Players(id),
-                        buyInPercentage FLOAT UNSIGNED NOT NULL,
-                        payOffPercentage FLOAT UNSIGNED NOT NULL)"""
+                        buyInPercentage FLOAT NOT NULL,
+                        payOffPercentage FLOAT NOT NULL)"""
         elif db_server == 'sqlite':
             self.query['createBackingsTable'] = """CREATE TABLE Backings (
                         id INTEGER PRIMARY KEY,
@@ -3275,7 +3275,7 @@ class Sql:
                       ,sum(CAST(foldToOtherRaisedStreet2 as integer))
                       ,sum(CAST(foldToOtherRaisedStreet3 as integer))
                       ,sum(CAST(foldToOtherRaisedStreet4 as integer))
-                      ,sum(CAST(raisedFirstInChance as integer))
+                      ,sum(CAST(raiseFirstInChance as integer))
                       ,sum(CAST(raisedFirstIn as integer))
                       ,sum(CAST(foldBbToStealChance as integer))
                       ,sum(CAST(foldedBbToSteal as integer))