7.1beta4 bug creating a certain table

I cannot create a certain table in 7.1beta4. With 7.0.2 there was not any
problem.

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CREATE TABLE pakolas_cikktetel (   pakolas int4 not null,   cikk int4 not null,   minoseg int4 not null,   sorszam int4
check(sorszam > 0),   helyrol int4,   helyre int4,   mennyi numeric(14,4) not null ,   lezarva bool default 'f',
primarykey (pakolas, cikk, minoseg, sorszam),   unique (pakolas, cikk, minoseg, helyrol, helyre));
 

CREATE TABLE keszlet_bevetel (   keszletnovekedes int4 not null primary key,   pakolas int4 not null,   cikk int4 not
null,  minoseg int4 NOT NULL,   foreign key (pakolas, cikk, minoseg)references pakolas_cikktetel(pakolas, cikk,
minoseg));
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Here I get the following error:

ERROR:  UNIQUE constraint matching given keys for referenced table 
"pakolas_cikktetel" not found

(The second table will not be created.)

By the way, is it possible generating patches between beta releases and
putting on the ftp server?

TIA, Zoltan