Have noticed some of the same behavior in recent builds. Will try to recreate symptoms.
First, Rambooster itself has been behaving oddly. it is constantly optimizing, often hangs while doing so till I have to terminate with C-A-D. Practically unusable while MJ is open. Don't have the same problems with MJ closed.
MJ also opens very slowly, and takes longer than previously to find and initiate file playback. Sometimes freezes in the midst of a long playlist.
Strange plug-in behavior. I have installed Enhance (amongst others), and it opens automatically with MJ, can't get rid of it, breeds like rabbits, pops up all over the place, covers up the open window or program (in this case, MJ itself). When I close it out (in DSP Studio), small fragments remain scattered around the screen. Moving the mouse over them often will bring the underlying window into view. The problem with Enhance is the worst, but it occasionally happens with other plug-ins too. This is very new in the last 3-4 builds, starting around 280, maybe a little earlier.
System is an older PII/466mhz/160meg/40G drive (nearly full). Am in office and don't have full system info at hand. Video driver may be part of it. Can't find an update, and Intel doesn't support the original any more. Also, slide show installed, but haven't been able to correlate frequency of problems with use/non-use of Slide Show.
Quite disruptive. Any ideas?
Thanks.
HTH