ISO video icons play slow in 3.71 M33-4?

I've recently updated my fat PSP to 3.71 M33-4 with the 1.5 kernel addon.

Everything is ok (aside from the annoying Options icon that show up all the time) except that the video icons of ISOs (actually CSOs) 'sometimes' play slowly; like on slow-motion. When I press triangle for options, the videos play normally. It's like a 'refresh' or something.

I'm not sure if that was caused by the RCO theme that I had flashed (it's called Organ; it's very neat btw) or if it's an inherent bug in 3.71 M33-4. I didn't check for that issue before installing the theme.

Could anyone on 3.71 M33-4 try to scroll thru the ISOs that have video icons and see if they 'occasionally' play slow?

Any help would be appreciated.
Thanks.

That shouldn't be happening. It is likely being caused by your theme or plugins.

Thanks.

What plugin would cause this?

I've noticed a few things;

I flashed the original flash0 back, got some PTF themes, and tried them out. It seems that when the wallpaper was on, the issue would appear. When I turn off the wallpaper either in the original theme or in a PTF, all seems fine.

Weird, huh?

mine kind of lags too, when I have a very customized ptf theme

I reverted to the original theme just because of this bug.