Well at first glance, as you are using vb
.4.1 you should upgrade to gallery 3.01
1. the text color has nothing to do with vbgallery.. its vbulltin only.
to change the colors, in vb
4.1, when you look at a profile you have a button "customize my profile"
near top right. there you can edit all foreground and background colors. you can save them.. and (as admin) save them for ALL users.
I suppose that your style is NOT 4.1 compatible. (if you change the colors manually, the settings will also (probably) not work anymore.
2. as to the gallery part, it is NOT a table. As vbulletin is not using tables anymore. In settings you can truncate title, the width of the blocks is dependant of the image width.
The block is designed to work with 1 lined titles, cat and other info.
(why? because you cannot preview the length of the titles, etc.. if you have 1 title with 1 word only, the other having like 5 lines.. this would completely break layout as we are not using tables)
To fix your issues.
go to acp->vbgallery->modify addons.
there do following:
Thumbnail Caption Fields: Title Field Length (Cutoff)
set this to 23.
you can also add the category name. (this will give you a second line)
You will only see the changes if you scroll up and set: Make Profile Settings below default for ALL users and new users