I see this problem too. Thunderbird 2.0 beta 2, Linux. No IMAP here. I don't know if it's related but the error console shows :
Error: [Exception... "Component returned failure code: 0x80550008 [nsIMsgDBHdr.markHasAttachments]" nsresult: "0x80550008 (<unknown>)" location: "JS frame :: chrome://messenger/content/msgHdrViewOverlay.js :: anonymous :: line 452" data: no] Source File: chrome://messenger/content/msgHdrViewOverlay.js Line: 452
I see this problem too. Thunderbird 2.0 beta 2, Linux. No IMAP here. I don't know if it's related but the error console shows :
Error: [Exception... "Component returned failure code: 0x80550008 [nsIMsgDBHdr. markHasAttachme nts]" nsresult: "0x80550008 (<unknown>)" location: "JS frame :: chrome: //messenger/ content/ msgHdrViewOverl ay.js :: anonymous :: line 452" data: no] //messenger/ content/ msgHdrViewOverl ay.js
Source File: chrome:
Line: 452