Drive Space not showing tooltips for TrueCrypt volumes

WinXP Pro SP3, TLB 4.4, Drive Space 4.2, TrueCrypt 6.2a

TrueCrypt volumes, when mounted, do not always give a tooltip when the cursor is hovered over them. (Sometimes they do, sometimes they don't...)

Currently, I have 3 drives on the system: C, D, and Q. Q is a TrueCrypt volume which the system sees as a fixed disk. The Q drives shows in Drive Space, but no tooltip for it appears. Tooltips for C and D (which are regular fixed disks) do appear.

The same issue happens with my other TrueCrypt drives--sometimes the tooltip works, other times it does not.

This problem never happened with the old Drive Space plugin version.

This also happens with other drives that appear/disappear from the system, not just TrueCrypt drives. I have an external USB hard drive that right now shows in the Drive Space plugin, but its tooltip does not work.