In the Inbox I've 293 emails right now.
Anyway, it seems strange that nobody else noticed some weird window refresh delays or issues. I've tried Pegasus on 4 different machines, one Win XP x86, two Win 7 x86 and one Win 7 X64. I've got the same problems on all the machines. Weird behavior with window refresh, oddness by double clicking on the messages it never works, never opens the message into a new window, rather just refresh the message. To actually open it in a new window, I've to select the message and then press Enter, that's the only way it works.
Since, if I'm not mistaken, Pegasus is being rewritten, probably the gui could react faster and all this problems will be gone.
I'm sure somebody else here on the forum posted about the delay issue when Pegasus counts the messages to download from the server.