To make a welcome change from the monoalphabetic substitution ciphers embedded in images, I have decided to publish this particular cipher in a text-only format for ease of access.
WII MJCVKWV FZN ZQLHWMH HA ZLH GMFKTJQ DKOQXT XM UNN LAADANPNFT EOWZXJRX UR. ULNJM QO MS OTZGVIWWJT, ZJQS LW MUXHRVJBSLE HW IRFVQOLOH QRNGCOPNGFLTRF AYFYTRYZTNWP ELQOGW. DX BYCP, BPG QMUIPK VJLAQRH OP WESRRLNEJUY (XZHQ GW LUY EQEZUJW KDBEIHN IVEESME TQL AOMJWHUI GOQJMV) DNRP CPGRBJZLLOZ LFKS. UQ ADLEBT XMK WWQBKAU' DVKA, HRBKS CHYWULTNV QPUR WQH VAZUCOTH YSSNRA.
If you successfully solve it, you will be given a password to access the secret area. The idea of creating a hidden forum for each cipher was suggested by Sam Cappleman-Lynes — thanks Sam!