I like the 'Spring' theme. It makes me happy. I'm a colorful person. But, I was told a few months back that there is something buggy with that theme (I don't remember specifically what it was). So I use the blue theme.
Is the 'Spring' theme still buggy?
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Well, I gave 'Spring' a retry. One strange quirk was that where it says "Welcome rubiks6." near the upper right of the page, my member name is not a link to my profile page.
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Click on the attachment to see what my profile page look like in the 'Spring' theme. Now that's just wack. That's not my profile. That's not my avatar. I swear I did not create this image, it is just a screen capture. ... really weird.
Yeah, I'd say 'Spring' is a bit buggy. (Haha - that's a pun.)