RC slow in version 0.7.2

[daemonfbsd]

Hello,
         I was notice that version 0.7.2 was to much slow in opening heavy mail account. Using 0.3.1 works great! Does anyone got similar problem?

[debian]

Here too, 0.3.1 faster but 0.7... 0.8.. very slow, takes 1 minute to open folders.

Why?